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ORV – SAGAR KANYA

CRUISE REPORT Tsunami Buoy Operation in

Bay of Bengal

Cruise No. SK – 330

(09 May 2016 – 06 June 2016)

Submitted by

Mr. V. Ravi Chandra

Mr. D. Purna Chandra Rao

Chief Scientist, SK-330

Indian National Centre for Ocean Information Services

Hyderabad – 500090

Acknowledgements:

I on behalf of the scientific team of SK-330 cruise, would like to

thank Captain Lallwyn GM Pinto, chief officer Vishant, chief engineer

and all officers, electrical engineers, catering crew, crane operators and

crew members onboard ORV SagarKanya, for their excellent co-operation

and good team work throughout the cruise in making this voyage a very

successful.

I wish to thank Mr.MM Subrahamaniyam and Pavan Shirodkar and

Rahul Mavi of NCAOR Goa, for all the administrative and logistics support

during the cruise, and Dr.Venkatesan, Head NDBP, NIOT Chennai, Mr

Muthumani, Sendhil, Mr Sasi Kumar for their support without which this

cruise would not have been a great success.

I sincerely thank agents Mr.Purushotaman, Mr.Anuj Sharma, and

Vijay and other team members of M/S Atlantic Shipping Corporation for

making all the paper works timely during sign on and sign off process and

also during port clearance of trucks and vehicle, customs clearance

process for port access.

Thanks to M/s NORINCO Engineers on-board for the works during

Deployment and retrieval operations and performing the Multibeam depth

survey, operating deep sea winch, and port side winch during ADCP

survey and deployment operations and CTD operation.

Finally I would like to thank all the members of scientific team of

SK-330 to make this a completely successful and enjoyable cruise.

Date: 06-June-2016 V. Ravi Chandra

Station: Tuticorin Chief Scientists, SK-330

Objectives:

This cruise was planned to accomplish five scientific operations.

The main objective of the cruise is to perform the schedule retrieval and

deployment operation of STB-01, and deployment of 3 more Tsunami

Buoys at new locations in Bay of Bengal STB-05, STB-04, STB-03 and

send the retrieved buoy for regular maintenance and refurbishment. A

batch of students from Goa University and Demphi college of Goa also

joined the cruise for internship/acclimatization, and participated in buoy

deployment operations as well as learned and exposed to various facilities

available in ORV Sagar Kanya, and conducted CTD operations and sea

surface salinity analysis as part of the training.

Cruise Track:

Initial Track:

The Initial plan of SK-330 cruise is from 09 May 2016 till 27 May 2016 to

sail from Chennai port directly to STB-05(N 13.50°, E 89.00°), STB-04(N

10.00°, E 88.50° ), STB-03(N 03.80°, E 91.70°), for Tsunami buoy

deployment operations and finally to STB-01(N 06.25°, E 88.88°)

Locations for Tsunami Buoy retrieval and deployment operations. After

the final mission reach Tuticorin port by 27th May 2016. Here is the initial

proposed track of the cruise.

Initial proposed route from Chennai port to STB 05, STB 04, STB

03, and STB 01 Locations in BoB.

Changed Track:

As there was a low pressure system which was reported on 13 May

2016, and further intensified into depression and deep depression during

14th, 15th, and 16th May 2016, there was a change in the route of the

mission due to extreme weather with wind speeds ranging around 27 – 32

knots and high swells, which reduced the speed of the vessel to 2.2

knots. This condition was reviewed by ship crew and scientific team. As

we have limited information of weather system, and no cyclone track

forecasts are available, with the limited information and to avoid any kind

of danger of getting caught in cyclone a change of course has been taken

towards Port Blair to take shelter at 23:30 IST on 16th May 2016 during

the transit from STB 05 location to STB 04 Location. So after travelling for

10 hours to a distance of 26 nm again the track has been changed back

to STB 04 location. Also after the deployment of STB 04 the plan was to

sail to STB03 location. But considering the weather conditions decided to

do the deployment/retrieval operation at STB01 location and move to

STB03 location. After reaching the station at STB01 location, due to

rough weather, decided to do the deployment operation first.

Route of SK-330 due todisturbance in low pressure weather

condition due to cyclone.

After the STB 01 deployment the vessel sailed to STB 03 location as

performance of retrieval of STB 01 operation need relatively calm

weather, and the existing weather is not conducive for retrieval operation

on 20 May 2016. After the deployment operation at STB 01 the vessel

moved to STB 03 location and performed the deployment operation at

STB 03 on 23 May 2016, and returned back to STB 01 location. Finally

after spending 2.5 days at STB 01 location for the retrieval operation, and

not finding conducive weather for a safe recovery of Buoy and BPR the

vessel headed to Tuticorin port for disembarkation.

Cruise Participants of SK-330:

The Scientific team of SK-330 constitutes scientists from INCOIS,

SAIC, NIOT, Norinco, DMS, and NCAOR. In addition to the scientific

personal, a group of students from Goa University and Demphi College of

Goa, have joined for internship/acclimatization of sea experience on

board. The list of Scientific team participated in SK-330 is given below.

Scientific Participants of SK-330:

S.No. Name of the Participant Designation Institute Nationality

01 Ravi Chandra Vedula Chf Scientist INCOIS INDIAN

02 Purna Chandra Rao Dande Dy Chf Scientist INCOIS INDIAN

03 Firoz Shah Prj Scientist-I NIOT INDIAN

04 James Robert Wrightsman Engineer SAIC USA

05 Shawn Jose Stoeckley Engineer SAIC USA

06 Rajapart Ramalingam Seamen DMS INDIAN

07 Sakthivel Devaraj Seamen DMS INDIAN

08 Emayavaramban Selvaraj Seamen DMS INDIAN

09 Udayakumar Raji Seamen DMS INDIAN

10 Yuvaraja Arumugam Seamen DMS INDIAN

11 K M Jayakrishnan Sr.Manager Norinco INDIAN

12 V C Sarathchandran Asst.Manager Norinco INDIAN

13 Avertano Callistus Luis Asst.Manager Norinco INDIAN

14 MManivannan Service Engineer Norinco INDIAN

15 Rahul Mavi SBA NCAOR INDIAN

16 Carol Arzu Bi Abedin Student Goa University

INDIAN

17 D’souza Jennita Anna Student

Goa

University

INDIAN

18 D’souza Tanvi Michael Student Goa

University

INDIAN

19 Fadte Gaonkar Diksha Ganesh Student Goa

University

INDIAN

20 Fernandes Alnilam Remny Student Goa University

INDIAN

21 Fernandes Christianna Student Goa University

INDIAN

22 Fernandes Roosevelt Student Goa

University

INDIAN

23 Gawas Sanyog Yogananda Student Goa

University

INDIAN

24 Ketan Govekar Shantikar Professor Demphi College

INDIAN

25 Gharde Adarsh Student Demphi College

INDIAN

26 Pratik Gajanan Kenaudekar Student Demphi

College

INDIAN

Deployment of SAIC Tsunami Buoys and Procedures followed:

The deployment of SAIC Tsunami buoy (referred as STB)

constitutes a series of well-defined procedure which ensures consistent

operation and functioning of Tsunami Buoy throughout the lifetime of the

Buoy till its scheduled maintenance. The deployment of STB constitutes 5

well defined steps to ensure a relatively consistent and efficient data

reception and its functioning. The steps are described in the following

section.

Multibeam Depth Survey:

Map showing 2X2 sqr km area and list of points for multi beam

depth survey around the BPR deployment location.

To ensure a relatively flat sea bottom, any new STB deployment location

has to be surveyed through multi beam echo sounder. The most suitable

location for a Tsunami buoy deployment would be a sea bottom with

<5°gradient.

A snap shot of the path traced by Sagar Kanya vessel during

multibeam echo sounding survey at the deployment location.

This ensures proper communication between BPR (bottom pressure

recorder) and surface buoy, and ensures that the BPR will always be in

communication with surface buoy which remains in the watch circle of the

BPR. A 2*2 km square area around the BPR drop point is selected for the

depth survey and vessel will be manoeuvred along a path which covers

maximum sampling points (around 25 points) separated by 500 meters

each so that a symmetrical array of sampling points are covered and give

a fairly good understanding of the sea floor. After the initial planning and

finalizing the required survey data points for depth survey, an initial

briefing has to be given to the bridge to navigate the vessel along the

decided course.

Analysis of the multibeam survey location with relatively flat sea

flour ( gradient <5 degrees)

The bridge and the on board scientific equipment team(Norinco team)

who operate the multi beam eco sounder, have same set of points to

collect depth information, and after the survey is finished results will be

analysed to find out the sea floor gradient. If the sea bottom’s gradient is

more than 5°, a new location has to be chosen for the Buoy deployment,

and again the survey has to be conducted. In case the gradient is <5°

the location can be used for deployment operation.

ADCP Profiling for Current Measurements:

To understand the influence of sub surface currents on BPR and surface

buoy during the deployment and to estimate the final point of landing

after the deployment, information about subsurface currents is extremely

important, which can be measured using ADCP(acoustic Doppler current

profiler) instrument.

Top 500 – 600 meters of sea surface may have currents with significant

speeds which may drift the BPR and Buoy. To perform the deployment

operations and to decide on the location of the drop point and vessel

speed and course, the sub surface currents information gives a precise

idea about the speed of vessel, course in consideration with wind profile,

and to finalize on a resultant course and speed of the vessel which helps

precisely in deploying the BPR and surface buoy at the desired location.

The ADCP instrument is configured each time before lowering the

instrument into the ocean, and after lowering the instrument for around

10 minutes the instrument is retrieved back and data is collected and

analysed to understand and find out the sub surface current pattern.

Map showing locations around BPR drop point for ADCP current

profiling.

A total of 5 different samples are collected to completely understand the

currents pattern over the area and averaged for the resultant current

pattern. Based on the ADCP results the final values of course and speed

of the vessel finalized to nullify the effects of currents and winds. The

port side CTD winch is used to lower the ADCP instrument for these

operations.

BPR Deployment:

Deployment of BPR from stern side of the ship using deep sea

winch and A-Frame at STB-05 location in Bay of Bengal

After finalizing the currents and wind speed, the vessel’s final speed and

course is decided and moved in such a way so that it nullifies the effects

due to currents and winds. The vessel is started at 1 nm away from BPR

drop point and a 1 kt speed is maintained. After reaching a distance of

300 meters from the BPR drop point, BPR floats are slowly released in

pairs into the ocean and finally at the BPR drop point the instrument is

deployed into the ocean, from the A-Frame from stern side. Deep sea

winch is used to deploy the BPR, and taglines are used support the

instrument and transferring load. A release mechanism is also used for

easy deployment of the instrument into the ocean. After releasing the BPR

the vessel is moved to 200 meters away from the drop point and start

listening to the BPR through BPR deck box, and the deployment is

monitored all along the transit. The tilt and depth is continuously

monitored and speed of deployment is continuously monitored during its

transit.

BPR Ranging:

After the BPR is deployed the BPR is ranged to identify the final position

away from the drop point. Based on the final BPR position on the sea

floor the surface buoy and Anchor drop point is decided, to keep the Buoy

in the BPR watch circle.

BPR Deck box and echoes tic transducer to monitor and range the

BPR transit into the Ocean.

For this a Benthos deck box and an echoes tic transducer are used to

range the BPR study point. The final BPR study point is measured using

triangulation method by choosing four different points to range the BPR

around the drop point and based on the distance the final settlement

point can be measured.

Buoy Deployment:

STB-05 surface buoy deployment from stern side using A-frame,

electrical winch and deep sea winch on vessel ORV Sagar Kanya.

The deployment of Surface buoy is a time intensive operation which takes

around 3 to 4 hours of time, after the BPR deployment and ranging. Once

the BPR is successfully deployed and communication is tested with

Benthos deck box for ranging the BPR, the final BPR settlement position is

determined. Then the deployment team determines the position of

Anchor drop point and course of the vessel. Then the vessel will be

navigated to a study point 6-8 km away from the Anchor drop point in a

desired course and buoy deployment operation begins. First the Buoy is

slowly released in to the ocean with A-frame, Atlas crane, deep sea winch

and few taglines to transfer load and balance the buoy from free

oscillations. After the buoy is deployed into the ocean the mooring line is

released through electrical winch and pulley. The vessel is moved with a

speed of 1-2 knots during this period and ensures medium tension on the

mooring line. After releasing all the mooring and applying a small drag

on the buoy the anchors are dropped at the specified drop point so that

the surface buoy finally settles in the BPR watch circle. If all the

operation is co ordinate and monitored carefully as per the plan there will

be proper communication between BPR and surface buoy and

communication is established between the systems.

Ground Station Confirmation:

After the BPR and Buoy is deployed successfully and the communication is

tested with BPR deck box for the data reception, the vessel has to halt for

a period of 6 to 8 hours near to the station for confirmation of data

reception. STB in normal mode communicates to the ground station

every 6 hours through iridium satellite at UTC, 00:15 hrs, 06:15 hrs,

12:15 hrs, 18:15 hrs. After the successful deployment the onboard

scientists have to confirm with ground station at tsunami warning centre

for confirmation of the data reception with an observation of 6 hourly

data. This confirms the proper deployment of tsunami buoy and the

vessel may release the station for the next operation.

Deployment of STB-05:

Deployment of STB-05 executed on 13-05-2016 at 05:45 IST. The vessel

ORV Sagar Kanya reached station at around midnight on 12 May 2016.

The operation started with multi beam depth survey at 05:45 IST in the

morning and continued for 2 hours till 07:30 IST. After the multi beam

depth survey ADCP measurements are taken at 5 different locations for

sub surface currents measurement. Once the ADCP data is measured and

analysed the net current influence is calculated by the deployment team.

After considering the prevailing wind speed and currents the final course

of the ship is determined to start the deployment operation. The

deployment operation started with the deployment of Bottom Pressure

Recorder (BPR). The BPR deployment operation starts with slowly

releasing the floats into the ocean at 300 meters away from drop point in

the specified course and finally BPR is dropped at the specified location at

13° 29.942'N, 88° 59.968'E at around 13:45 IST. For this operation,

deep sea winch, Atlas crane, A-Frame and a release mechanism is used.

The load transfer is done using taglines controlled with multiple eye bolts

and onboard hooks. After the deployment of BPR the BPR is ranged using

Benthos deck box and the final position of the BPR is ranged as 13°

29.983'N, 88° 59.864'E. After determining the BPR final point the vessel

is moved to 6 km away from the Anchor drop point. The operation of the

Buoy deployment started with slowly releasing the surface buoy at the

specified location maintaining a course of 135 degrees, and slowly

releasing the mooring line at a speed of 1-2 knots. For this operation

deep sea winch, A frame, electrical winch and Atlas crane are used. The

mooring is slowly released with the help of electrical winch and finally the

dead weights (anchors) are released at the specified anchor drop point

13° 29.857'N, 89° 0.243'E. This buoy deployment operation took around

2:45 hrs. After the anchor is released vessel is moved to 2 nm away from

anchor drop point and halted at the station and wait for the confirmation

of the data reception from ground station. The vessel released the station

at mid night 12:30 after the confirmation from ground station about the

data reception.

Here is the table of deployment information of STB-05:

Vessel ORV-SAGAR KANYA

Area of Deployment BAY OF BENGAL

Cruise No SK-330

Cruise Duration 09 May 2016 - 06 June 2016

Operation Deployment of STB-05

Date of Operation 13-05-2016

Depth of the Ocean 2990 m

Duration of Operation 05:40 to 20:45

BPR Drop point 13° 29.942'N, 88° 59.968'E

BPR Drop time 13:35 IST

BPR Final point 13° 29.983'N, 88° 59.864'E

Anchor drop point 13° 29.857'N, 89° 0.243'E

Anchor drop time 21:43 IST



ORV Sagar Kanya reached station at around midnight on 20:30 IST on 16

May 2016. The operation started with multi beam depth survey on 20:30

IST on 16 May 2016 and continued the operation for 2.5 hours till 23:00

IST. After the multi beam depth survey ADCP measurements started at

06:30 IST in the morning of 17th May 2016. These measurements are

taken at 5 different locations for sub surface currents measurement.

ADCP data is measured and analysed and net current influence is

calculated as 0.6 knots speed by the deployment team. After considering

the prevailing wind speed and currents the final course of the ship is

determined to start the deployment operation. The deployment operation

started with the deployment of Bottom Pressure Recorder (BPR). The BPR

deployment operation starts with slowly releasing the floats into the

ocean at 300 meters away from drop point in the specified course and

finally BPR is dropped at the specified location at 9° 59.913'N,88°

30.039'E at around 11:00 IST. For this operation, deep sea winch, Atlas

crane, A-Frame and a release mechanism is used. The load transfer is

done using taglines controlled with multiple eye bolts and onboard hooks.

After the deployment of BPR the BPR is ranged using Benthos deck box

and the final position of the BPR is ranged as 9° 59.942'N, 88° 30.002'E.

After determining the BPR final point the vessel is moved to 8 km away

from the Anchor drop point. The operation of the Buoy deployment

started at 17:15 IST with slowly releasing the surface buoy at the

specified location maintaining a course of 180 degrees, and slowly

releasing the mooring line at a speed of 1-2 knots. For this operation

deep sea winch, A frame, electrical winch and Atlas crane are used. The

mooring is slowly released with the help of electrical winch and finally the

dead weights (anchors) are released at the specified anchor drop point 9°

59.609'N, 88° 29.828'E, at around 20:15 IST. This buoy deployment

operation took around 2:52 hrs. After the anchor is released vessel is

moved to 2 nm away from anchor drop point and halted at the station

and wait for the confirmation of the data reception from ground station.

The vessel released the station at mid night 22:30 IST after the

confirmation from SAIC ground station about the data reception.




Cruise No SK-330






BPR Drop point 9° 59.913'N,88° 30.039'E







ORV Sagar Kanya reached station at around 23:00 IST midnight on 19

May 2016. The operation started with multi beam depth survey at 05:30

IST in the morning of 20 May 2016 and continued for 1 hours till 06:30

IST. After the multi beam depth survey ADCP operation started at 06:30

IST and measurements are taken at 5 different locations for sub surface

currents measurement. This operation took around 2.5 hours. The ADCP

data is measured and analysed the net current influence is calculated by

the deployment team. After considering the prevailing wind speed at 20-

25 knots and swells 3.0-4.5 meters and currents the final course of the

ship is determined to start the deployment operation. The deployment

operation started at 11:30 IST with the deployment of Bottom Pressure

Recorder (BPR) this operation took around 1.5 hours. The BPR

deployment operation starts with slowly releasing the floats into the

ocean at 300 meters away from drop point in the specified course and

finally BPR is dropped at the specified location at 6° 14.962'N, 88°

41.811'E at around 11:47 IST. For this operation, deep sea winch, Atlas

crane, A-Frame and a release mechanism is used. The load transfer is

done using taglines controlled with multiple eye bolts and onboard hooks.

After the deployment of BPR the BPR is ranged using Benthos deck box

and the final position of the BPR is ranged as 6° 14.927'N, 88° 41.854'E.

After determining the BPR final point the vessel is moved to 8 km away

from the Anchor drop point. The operation of the Buoy deployment

started at 18:30 IST, with slowly releasing the surface buoy at the

specified location maintaining a course of 178 degrees. After few minutes

while the buoy is getting deployed the acoustic transducer is rubbed

against metal grid of the vessel and the vessel is halted to replace the

acoustic transducer as a precaution. The Buoy deployment operation

restarted again at 19:45 IST, and slowly releasing the mooring line at a

speed of 1-2 knots. For this operation deep sea winch, A frame, electrical

winch and Atlas crane are used. The mooring is slowly released with the

help of electrical winch and finally the dead weights (anchors) are

released at the specified anchor drop point 6° 14.946'N, 88° 41.934'E., at

around 21:45 This buoy deployment operation took around 2:50 hrs.

After the anchor is released vessel is moved to 2 nm away from anchor

drop point and halted at the station for one hour. At 22:30 IST released

the station started to the STB03 location for deployment operation.

Reception of data is confirmed from ground station during midnight in the

transit.




Cruise No SK-330





Duration of Operation 05:30 IST- 22:00 IST

BPR Drop point 6° 14.962'N, 88° 41.811'E







ORV Sagar Kanya reached station at around night at 20:15 IST on 22 May

2016. The operation started with multi beam depth survey on 22-05-

2016 20:30 IST in the night and continued for 2 hours till 22:30 IST.

After the multi beam depth survey, results are analysed and confirmed

the location as suitable for deployment operation. ADCP measurements

are taken at 5 different locations for sub surface currents measurement,

during morning at 06:30 IST on 23-05-2016. ADCP operation took

around 2.5 hours and data is measured and analysed the net current

influence is calculated as 0.6 knots which is insignificant by the

deployment team. After considering the prevailing wind speed and

currents the final course of the ship is determined to start the deployment

operation. The deployment operation started with the deployment of

Bottom Pressure Recorder (BPR). The BPR deployment operation started

at 10:30 IST with slowly releasing the floats into the ocean at 300 meters

away from drop point in the specified course and finally BPR is dropped at

the specified location at 3° 47.922'N, 91° 42.066'E at around 11:15 IST.

For this operation, deep sea winch, Atlas crane, A-Frame and a release

mechanism are used. The load transfer is done using taglines controlled

with multiple eye bolts and onboard hooks. For this operation a team of 6

deployment engineers and assistants worked in addition to onboard

operators. After the deployment of BPR the BPR is ranged using Benthos

deck box and the final position of the BPR is ranged as 3° 47.886'N, 91°

42.063'E. After determining the BPR final point the vessel is moved to 8

km away from the Anchor drop point. The operation of the Buoy

deployment started with slowly releasing the surface buoy at the specified

location maintaining a course of 179 degrees, and slowly releasing the

mooring line at a speed of 1-2 knots. For this operation deep sea winch,

A frame, electrical winch and Atlas crane are used. The mooring is slowly

released with the help of electrical winch and finally the dead weights

(anchors) are released at the specified anchor drop point 3° 47.892'N,

91° 42.227'E. This buoy deployment operation took around 2:50 hrs.

After the anchor is released vessel is moved to 2 nm away from anchor

drop point and halted at the station and wait for the confirmation of the

data reception from ground station. The vessel released the station at mid

night 23:45 IST after the confirmation from ground station about the data

reception. The vessel headed back to STB01 location for the final

recovery operation.




Cruise No SK-330






BPR Drop point 3° 47.922'N, 91° 42.066'E



Anchor drop point 3° 47.892'N, 91° 42.227'E.


Development of Cyclone Roanu and associated extreme weather

condition:

A low pressure weather system has formed in off south east coast of Sri

Lanka on 13 May 2016. According to Indian Meteorological Department

the low pressure system is very likely to form over south west Bay of

Bengal off Sri Lanka coast in next 24 hours and it would further develop

as deep depression in next 48 hours with low/medium clouds over Bay of

Bengal and South Andaman Sea. This information was received by

onboard scientific team and started monitoring the system very closely

with timely information from INCOIS ground station.

This system has further intensified into deep depression on 14 May 2016,

and into cyclonic storm by 15th May 2016. The prevailing winds on 14th

May 2016, was observed as below 10 knots and on 15th May 2016 around

15 knots and vessel speed around 5.2 knots. In the evening of 15th May

2016, the vessel is more in proximity to the weather system and the

observed wind speeds are in the range of 18-20 knots. Information from

ground station and model predictions with satellite observation has clearly

shown a deep depression has formed at 8.3N, 80.0 E, concentrated off

southeast coast of Sri Lanka. The swell heights and wind speeds picked

up significantly on the night of 15th May 2016, as the vessel is more near

to the disturbance and the situation was reviewed by the ship crew and

scientific staff. An emergency meeting with scientific staff and ship crew

was conducted to review the situation and discuss the contingency plans.

A change of course has been taken considering the safety of the ship

towards Macer Creek at Andaman Islands to take shelter as the vessel

speed has been drastically dropped to 2.5 knots at an observed wind

speed of 30 knots. The on board scientific staff continuously got

information about the weather system from INCOIS ground station, and

reviewed the weather updates with ship crew for the subsequent plans of

action.

Also ECMWF model and other model forecast closely in agreement

forecasting the development of the system and its progression in the next

4-5 days along the east coast of India in the Bay of Bengal and slowly

changing its track and hitting the coast of Bangladesh by 22nd May 2016.

Finally the cyclone Roanu hit the coast of Bangladesh on 22nd May 2016.

All model predictions have suggested 15-20 knots wind speeds at STB01

and STB 04 locations which suggested relatively rough weathers during

the deployment operations.

Extreme weather conditions due to cyclone Roanu and non-

recoverability of STB-01:

The recovery of STB-1 was scheduled on 20th May 2016. Due to

the extreme weather condition the deployment of STB01 was performed

on 20th May 2016, and recovery was postponed for a relatively calm

weather window. For a safe recovery of Surface Buoy and BPR the wind

speeds must be less than 12 knots and swell heights must be less than 3

meters height. The original plan to recover the Buoy and BPR was to use

a small boat to hook the surface buoy and use A-Frame, Atlas Crane,

Electrical Winch and deep sea winch to recover the buoy from stern side.

But considering the rough seas the recovery was planned without using

small boat considering the safety of the men to board the small ship. Also

during the recovery of the BPR the white caps should be relatively less so

that the floated BPR can be spotted visually to recover. Considering the

weather and winds, and choppy seas prevailing due to the active

formation of Roanu the recovery was postponed during return as the

cyclone will hit the coast and its influence is subsides. Again on 26th May

2016 vessel reached STB 01 location for the recovery operation. ORV

Sagar Kanya reached location at 13:30 IST and started manoeuvring the

ship from starboard side using propulsion motors to approach the buoy.

The requirement of the vessel is to reach the buoy at 1 meter distance

from start board side so that the buoy can be hooked from the vessel

itself. The prevailing swell height is around 2.5-4 meters and winds

around 20 knots which rules out any possibility of using a small boat to

hook the buoy. Vessel could able to reach to the nearest distance of 35

meters from starboard side after making 4 attempts to reach near to the

Buoy. As the day light passes the operation schedules for 27 May 2016.

The operation again resumed at 6:30 IST on 27th May 2016. Vessel

started manoeuvring to approach the buoy using propulsion motors in

north-south course. By 12:30 IST the ship made 4 attempts to reach

near to the buoy with a speed of 1.0 knots, but could able to reach a

minimum distance of 25 meters from star board side, beyond this

distance the steering of the ship is out of control. The onboard scientific

team reviewed all the other alternative options for recovery and realized

the weather condition with wind speeds ranging 18-20 knots and swell

heights around 3.5-4.0 knots which rules out the possibility of lowering

the small boat. The vessel continued on approaching the Buoy using

propulsion motors for the remaining part of the day. The DP of the vessel

cannot be operable with the prevailing sea conditions so the only

alternative left behind was to approach through propulsion motors or wait

for a clear weather window where DP can be operated. All the weather

reports and wave forecasts only signifies a very small weather window

before 29th May 2016, and after that the weather will be more rough due

to onset of south-west monsoon. So on 28th May2016 06:30 IST the

retrieval operation again resumed and observed swells with 3.5 meters

with winds around 18 knots. As there was no calm window either to

lower the small boat into the ocean or operate DP to reach the Buoy. The

situation was reviewed and communicated with INCOIS and SAIC and

made contingency plans to recover the Buoy in the next 12 months before

the scheduled maintenance operation. The operation for recovery was

revoked during the present mission and postponed for the subsequent

cruise.

Summarized details of SAIC Tsunami Buoy deployment in Bay of

Bengal during cruise on board (ORV-Sagar Kanya SK-330):



Cruise No SK-330


Operations SAIC Tsunami Buoy Deployment

S.No Buoy Id

Date of Deployment

Location Depth of Ocean (m) Latitude Longitude

1 STB 05 13-05-2016 13° 30.00' N 89° 00.00' E 2990

2 STB 04 17-05-2016 10° 00.00’ N 88° 30.00’ E 3400

3 STB 01 20-05-2016 06° 15.00’ N 88° 42.00’ E 3850

4 STB 03 23-05-2016 03° 48.00' N 91° 42.00' E 4055

Students Activities and Onboard Training Programme:

A group of students from Goa University and Dhempe College of Goa, also

joined the cruise for sea experience and internship/acclimatization. The

students have been engaged in various activities including visit to ship

facilities, various labs, engine room, visit to bridge and navigation room,

communication room etc., and various expert talks, and student

presentation on various topics of relevance. Also the students are

engaged and explained about the Tsunami buoy deployment and retrieval

operation, CTD operations, and sea surface salinity analysis at various

positions on the route of the vessel.

CTD Operation:

CTD operations are a vital part to understand the dynamics of the ocean

and it gives the information about the thermo cline and other chemical

and biological properties of the ocean. The CTD operation has been

conducted at STB05 and STB03 locations to a depth of 600 meters to

understand the properties of the ocean. Onboard students have

participated in this exercise and results are analysed and noticed the

thermo cline has been observed in the analysed results.

Sea surface salinity analysis:

Sea surface samples have been collected and analysed for salinity

information of the sea surface samples, temperature measurements and

preserved for further analysis at university. Four samples every day at

every 3 hours a day are collected on route of the ship and preserved in

sampling bottles which were taken back to university for analysis and

study, of sea surface salinity and temperature.

Biological study on Ocean Insects:

To identify and capture ocean insects and to do the biological study of the

ocean insects and their migration properties two insect capture nets have

been inserted at the front side of the vessel at the 2nd deck, and regular

observation of the captured insects have been monitored during the entire

duration of the cruise.

Visit to various labs and facilities:

All students have been accompanied to various labs and facilities onboard

ORV Sagar Kanya. The student’s lab visits and facilities of the ship have

been scheduled on various days and the respective in charge of the

lab/facilities have given detailed explanation of the facilities labs with

demonstration. Visit to the engine room, bridge, and scientific labs and

equipment of the ship has been scheduled and made available for their

learning. Students also actively participated and their questions have

been clarified with the respective staff members.

Onboard Expert and Students presentation:

Onboard students have been given assignments to present on various

topics of their academia, research and professional interest. Many of the

students have participated and given presentation on various topics of

their academic and research interest. Also onboard experts from INCOIS,

NIOT, Norinco, and ship crew have presented on various aspects during

the entire cruise expect on operational days. All presentations have been

followed by a discussion and Q&A.

Buoy operations deck walkthrough:

A brief explanation of the objectives and mission of the cruise has been

briefed to the students. The operations of the tsunami buoy and its

functionality various equipment and accessories, overall deployment

procedure have been explained to the students with a presentation. The

students have actively participated in the presentation and followed by

Q&A and discussion. After the explanation, the students have been

accompanied to the main deck and all the parts of the tsunami buoy and

its functioning has been detailed, which includes BPR and its functioning,

various parts of BPR, sensor, acoustic release, Surface buoy and its

functionality, various parts of buoy, navigational lanterns, radar

reflectors, buoy electronics, acoustic transducers, communication between

buoy and BPR and satellite communication between buoy and ground

station over iridium satellite.

Dairy of Events:

08-May-2016

@ 09:00 IST reached port and started loading the equipment to the

vessel. All the 11 trucks material has been started loading into vessel

according to the planned layout.

@ 14:30 IST finished the loading of equipment into the vessel, and

started lashing of the equipment.

@ 15:30 IST Had a brief meeting with the captain of the ship about the

various operational aspects and vessel capabilities.

@ 17:30 IST back to NIOT and follow up with NCAOR and NIOT on Sign

on procedures and schedules.

09-May-2016

@ 10:30 IST Loading of winch, winch tools and accessories, ADCP

accessories into the small truck. coordinating with the agent for customs

clearance for the winch.

@ 12:30 IST sign on process, initiated and finished in 2.5 hours.

@ 14:30 IST sign on finished, and reached to the berth and signed on.

@ 17:00 IST Installation of Electrical Winch and Welding the winch to the

main deck on the vessel. Electrical winch is tested with a trial run.

10-May-2016

@ 09:00 IST Layout planning, lashing material, and basic deck work for

the deployment operations performed. Onboard operational equipment

made ready.

@ 14:00 IST Made the execution plan and presentation for briefing the

onboard crew and bridge about the complete operations.

@ 16:00 Meeting with Norinco about the operational technicalities of CTD

Winch, Deep sea winch, and Multi beam eco sounder, also the operational

methodology of Teledyne ADCP.

@ Daily water samples collection for sea surface salinity analysis during

10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

Internship/Training of Students:

@ 10:00 IST Meeting with Master and planned schedule for all the

onboarding students for various lab visits, visits to various ship facilities

etc.,

@ 10:30 Visit to Bridge, Life at Sea, Maritime communication, and various

experiences of the ship crew has been shared to the students. All the

bridge operations and equipment has been briefed to them.

@ 16:00 Given a talk on Functioning of Tsunami Buoys: About how the

tsunami buoy, BPR and Tsunami warning center works, and importance of

real time sea level information for tsunami warning

@ 17:00 Indian Tsunami Early Warning Center, Earthquake mechanism,

and how Tsunami Buoys are helping for the early detection of tsunamis.

Tsunami buoy functionality has also been covered and an extended Q&A

and interaction with all students.

11-May-2016

@ 10:30 IST checking with the bridge for satellite phone communication

with SAIC, for communication during operations.

@ 10:00 Meeting with Norinco about the operations of CTD winch, Multi

beam eco sounder, and ADCP operations.

@ 10:30 IST, Visit to Engine room to students and how various machinery

operates in the ship.

@ 10:30 IST, Deck preparation, Installation of accoustic releases,

assembling payload electronics, laying out deployment and support

linings.

@ 16:30 IST, Safety Drill and safety briefing.

@ 17:30 IST, Presentation on Indian Tsunami early warning system, its

genesis, and its present operations and services to students, and Q&A.

@ 21:30 IST, final briefing about the STB-05 Deployment operations

internally and brain storming various aspects and possibilities, Budgeting

the operational time.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

12-May-2016

@ 10:30 IST Final briefing of operation to all the vessel crew and also

deck visit.

@ 14:30 IST Final deployment preparations and assembling.

@ 20:00 IST site survey points shared with the Norico team for multi

beam survey.

@ 10:30 IST Various Labs visit to all students, and various laboratory

instruments.

@ Sea surface sample collection for sea surface salinity analysis.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

13-May-2016

@ 05:45 IST Multibeam depth survey to find out the sea surface bottom,

after the survey and analysing the result the surface is less than 0.6

degree which is in acceptable limits(<5 degree), so continued to do the

ADCP profiling.

@ 08:30 IST started the ADCP profiling at 5 different locations for

sampling the data and identify the sub surface current speed and

direction. After the data collection and analysis we identified a 0.6 kt

speeds of sub surface currents, which has much less influence and finally

decided to consider the wind speed at 6-10kt has more influence on the

vessel, at 135 degrees.

@ 13:00 IST Started in the way point at a distance of 400 meters away

from the BPR drop point and maintained a course towards the drop point.

Lowered the glass floats at a vessel speed of 1kt, and with 2 kt speed and

dropped the BPR at the specified BPR drop location lat 13°29.942'N, lon

88° 59.968'E.

@ 14:30 IST moved the vessel to 200 meters away from the BPR drop

point and started listening to the BPR through deck box, BPR started

communicating with the deck box and throughout its transit at a speed of

100 ms per minute it hit the ground in 45 minuts at a depth of 2938

meters, and setteled.

@ 17:30 IST Started to the way point at distance of 6 km so that to

maintain a course of 135 degrees, and heading back to the Anchor drop

point of lat 13° 29.857'N, and long 89° 0.243'E; and finally dropped the

anchor at 20:40 IST.

@ 20:45 We have moved to 2 nm away from the Anchor drop point and

keep the vessel drifting so that we can get confirmation from the ground

that the data reception is intact.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

14-May-2016

@ 05:30 IST We have received the orders from the ground about the data

reception and can release the station. started to head STB-04 location.

@ 09:30 IST deployment preparations for STB-04 Buoy. Placed the Buoy

and BPR assembly to the respective deployment locations using NOV

crane and Atlas crane.

@ 11:30 IST started precautionary measures based on the information

about development of low pressure weather system off Sri Lanka which

may further intensify into depression. Started continuously monitoring the

weather system, and also lashing all Buoy, BPR, mooring with additional

supports as an extra precaution.

@ 20:00 IST Individual presentation by Tanvi D'souza on Cuttlefish and

its behaviour followed by Q&A.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

15-May-2016

@ 9:30 IST Information on latest weather update received and based on

that we have made our contigency plans, the vessel speed is around 5 kt

and wind speed is around 10 kt, wave heights are around 0.5 - 1 meter.

@ 11:30 IST, weather observation is going on, the wind picked up to 15

kt, with wave heights reaching 1 meters, ETA is 16 May 2016 02:30 IST,

and vessel speed is around 5.2 knots

@ 14:30 IST, weather observation is going on, the sea become a bit

rough and the wind speed is around 18-20 kt, and wave heights are

around 1.2 - 1.5 meters. Sea roughness is getting increased. Vessel

speed is maintained at 4.5 - 5.0 knots

@ 15:00 IST, Training to all seamen on holding the Taglines, for higher

safety and load transfer during deployments by SAIC team.

@ 16:30 IST, weather observation is going on, received updated

information from IMD about the situation, and the wave heights reached

around 2 meters, and wind speeds touching 24 knots. Vessel speed is

around 3.5 - 4 knots.

@ 20:00 IST Individual presentation on Marin communications by

onboard student Adarsh followed by Q&A.

@ 20:30 Meeting at the Bridge about the contigency plans, and contacted

to the ground stations of INCOIS, and SAIC to get updated information

about the low pressure system, and its chances of moving towards the

eastern side and intensification. The weather observation is going on with

wind speeds touching 30 knots, and vessel speed at maximum going at

2.5 knots. Based on the inputs from ship crew, and limited weather

information at hand and after contacting ground stations at SAIC and

INCOIS, made a decision to go towards the nearest point of Andaman

Islands, MACER CREEK, considering the safety of the vessel. Noticed the

Wind speeds touching 30 knots and decided to change the course.

@ 21:30 IST vessel course has been changed to eastern side heading

MACER CREEK, which keeps the vessel away further 25 to 30 nm, away

from the disturbance.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

16-May-2016:

@ 0930 IST we decided to take the STB 04 track from the existing

position 25 nm away from our initial path. Considering the latest weather

forecast and direct observation during day we have taken STB 04 path

from the existing position. weather observations is going on with wind at

15-20 knots and swell around 1-1.5 meters

@ 10:30 IST contacted the INCOIS ground station and SAIC and got

weather inputs about the slowly developing low pressure weather system.

Most of the day spent time on analysing weather reports and direct

observation of the weather. Weather observations is going on with wind

at 18-24 knots and swell around 2-2.5 meters.

@ 14:30 IST contacted few INCOIS officials go get waveheight and swell

information along the ship route. Based on the analysis and conclusion

we have decided the weather condition would be below the threashold

limits to conduct deployment operations at the location. weather

observations is going on with wind at 18-24 knots and swell around 2-2.5

meters

@ 15:00 IST Had meetings with SAIC team and ship crew, seamen about

the operational plans and risk management, of the STB-04 operations.

weather observations is going on with wind at 18-24 knots and swell

around 2-2.5 meters

@ 17:00 IST made arrangements for additional tag lines to support the

deployment operations to face rough sea situation during operations.

Weather observations is going on with wind at 18-25 knots and swell

around 2.5-3.0 meters. ETA to the Location is 20:30 IST.

@20:30 IST started multi beam depth survey to the pre defined points for

about 2.5 hours and the average depth came around 3400 meters with a

slope of 0.6 degrees (<5 degrees threshold). Weather observations is

going on with wind at 15-20 knots and swell around 2.5-3.0 meters. Wind

speed is below the threshold but swell height is exactly at the threashold.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

17-May-2016

@ 06:30 IST started the ADCP survey for sub surface current speed and

direction and after performing the ADCP measurements for about 4 hours

at 5 different points and assimilating and analysing the data finally

noticed that the currents are 0.6 knots speed and winds have more

influence than currents. The bearing of the winds are at 176-180

degrees, with wind speed between 15-20 knots.

@ 12:30 IST started the BPR started the BPR operations. Given the BPR

drop point and BPR start point to the bridge and started heading to the

BPR start point which with a bearing of 0 degrees heading the winds.

@ 14:15 IST started dropping the floats into the water from BPR start

point and dropped the BPR at BPR drop point lat 9° 59.913'N, lon 88°

30.039'E and moved the vessel to 300 meters away from the drop point

and started listening to the BPR decent in the water. The BPR settled in

about 45 minutes.

@ 15:15 IST started ranging the BPR from 5 different locations and

identified the exact location of the BPR.

@ 17:15 IST started Buoy deployment operations. Went to 8 km away

from anchor drop point in 0 deg course, and headed at 180 deg course

towards the anchor drop point. The complete operation was scheduled

for 2 hrs 52 minutes at around 2knots speed. Dropped Anchor at 20:15

IST and moved the vessel to 2 nm distance and put the vessel in DP

mode.

@ 22:30 IST got information from SAIC ground station that back channel

commands from centre to Buoy and BPR are working and can able to read

the data. Final release station info is going to be issued after observing 6

hours data.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

18-May-2016

@ 09:30 IST started preparations for the recovery of the surfacebuoy and

BPR of STB01. Layed taglines and deck work required for the STB01

deployment and recovery of the Buoy.

@ 11:30 IST Finalized the recovery plan and deployment plan, re

arrangement of materials and tools on the deck from starboard side to

port side. Movement of spare anchors etc.,

@ 15:30 IST Made preparations final testing of all the cranes and tools for

the recovery of STB01.

@ 19:00 IST started development "briefing presentations" for the ship

crew and other staff about the STB 01, deployment and recovery

operations, developed couple of options for the recovery and deployment

of the BPR, surface buoy, considering the weather conditions. weather

observations is going on with wind at 20-22 knots and swell around 3-3.5

meters.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

19-May-2016

@ 10:30 IST Buoy and BPR retrieval briefing presentation finalized. Had

an internal meeting with all the operational crew about the recovery and

deployment plans. Final Q&A and ready for presentation for the ship

crew.

@ 15:30 IST Recovery Briefing to the Ship crew about the recovery option

of STB01 Buoy and BPR and Deployment of Buoy and BPR. Addressed all

the concerns, raised the issue of not using DP if the windforce is more

than 12 knots. Acceptance of taking the ship next to the Buoy through

Propolusion Motors.

@ 23:00 IST reached STB01 station and started the Multibeam depth

survey in a 2*2 area at 25 different points, and concluded that the

surface angle is less than 5 degrees (<5 degrees) and within acceptable

limits for the deployment.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

20-May-2016

@ 05:30 IST Weather observation and review of the plans and concluded

that the weather is not suitable for the recovery of BPR and surface buoy,

so started with the Deployment plans at first, so decided to start with the

ADCP measurements.

@ 06:30 IST started with ADCP survey at 5 different points for sampling

subsurface currents, The survey took us around 2.5 to 3.0 hours and

results analysed for significant influence of currents.

@ 10:30 IST Weather observations are going on with Winds around 20-25

knots and swells around 3.0 - 4.5 meters. After the analysis of the wind

direction and current direction, final course and distance is shared with

the bridge for the vessel movement for BPR deployment.

@ 11:30 IST vessel reached the BPR wait point and started with the BPR

deployment process, and took around 1.5 hours for the BPR deployment

and deployed the BPR and the specified location, at the BPR drop point

lat 6° 14.962'N, and long 88° 41.811'E.

@ 14:30 IST started the BPR ranging from 5 different points for the BPR

positioning. The BPR is at a distance of 100 meters from the BPR drop

point. After the analysis of the BPR ranging, finally decided on the Buoy

drop point and course to take.

@ 18:30 IST Buoy deployment process has been started from 8 kms

away from the Anchor drop point at a speed of 1-2 knots. Reached the

Buoy wait point and started the Buoy deployment process. Started

lowering the buoy at the buoy drop point at around 19:00 IST. As the

Buoy acoustic transducer touched the metal grating, during deployment,

so replaced the acoustic transducer with a spare acoustic transducer.

@ 19:45 IST Buoy deployment re started again from the Buoy steady

point and with a speed of 1-2 knots, started the Buoy deployment, at the

specified location, dropped the Buoy. After Buoy deployment and

mooring line is out and deployed the Anchors, at the specified Anchor

drop point, which is lat 6° 14.946'N, Lon 88° 41.934'E.

@ 21:45 IST The Buoy Deployment process finished and Vessel moved to

2 nm away from the Anchor drop point.

@ 22:30 IST Released station and started to the STB03 Location for the

subsequent deployment of STB03 Buoy.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

21-May-2016

@ 09:30 IST Weather observation going on with Winds in the range of

18-24 knots and swells ranging between 2.5-4.0 knots.








10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

22-May-2016

@ 09:30 IST Started all the preparations

@ 11:30 IST Started the deck work preparation for STB03 Buoy

deployment, arranged taglines ready for the deployment of Buoy, weather

observation with wind force around 15 knots and swells around 2.0-2.5

meters.

@ 14:30 IST weather observation is going on with winds around 15-20

knots and swells around 2.5-3.0 meters range.

@ 20:30 IST reached STB03 location and started multi beam depth

survey in a 2*2 sq kms area. After the survey the results show the sea

surface gradient is in acceptable limits (<5 degrees).


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

23-May-2016

@ 06:30 IST Started ADCP depth survey at 5 different points to

determine the subsurface currents and analysed the data. The current

speeds are around 0.6 knots which is insignificant as compared to the

wind speed influence.

@ 09:30 IST Finished the ADCP survey and finalized on the course and

distance of the steady point and drop point of BPR and shared with the

bridge, started for the Steady point for BPR deployment.

@ 10:30 IST started the BPR deployment process. Started dropping glass

floats from 300 meters away from the BPR drop point with a vessel speed

of 1 knots and Dropped the BPR at the specified BPR drop point lat 3°

47.922'N and Lon 91° 42.066'E.

@ 11:30 IST started listening to the BPR in the deployment mode, with

BPR making a title of x=0, y=2 and with a speed of 1.33 m/s. The transit

took around 45 minutes and final depth was around 4004 meters.

@ 12:30 IST started the BPR ranging at 5 different locations for

identifying the final position of the BPR. The BPR was dropped at 100

meters away from the BPR drop point.

@ 14:00 IST started the Buoy deployment, with a final course and

distance is determined after ranging the BPR and positions are shared

with the bridge for the study and drop points of Buoy and Anchors,

started to the study waypoint which is around 8 kms from the Anchor

drop point.

@ 14:30 IST started the Buoy deployment process and dropped the Buoy

at the specified Location, and started releasing the mooring.

@ 17:45 IST dropped the Anchors at the Anchor drop point at lat 3°

47.892'N, lon 91° 42.227'E and moved the vessel 2 nm away from the

anchor drop point and waited at the station.

@ 23:45 IST got information from ground station after observation of 6

hourly data, that data is intact and can release the station, and started to

the STB01 location for the retrieval mission.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

24-May-2016

@ 09:30 IST started to STB01 location for the recovery mission and

weather observation going on with winds around 27 knots and swells

around 2.5-3.5 meters

@ 11:30 IST ETA to STB01 2d 6 hours location for the recovery mission

and weather observation going on with winds around 22 knots and swells


@ 14:30 IST ETA to STB01 location 2d 2 hours for the recovery mission



@ 17:30 IST ETA to STB01 location 1d 22 hours for the recovery mission


around 2.0-3.0 meters.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

25-May-2016

@ 09:30 IST ETA to STB01 location 34 hours for the recovery mission and













10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

26-May-2016







@ 13:30 IST reached the STB01 location and started approaching the

buoy and manoeuvring the ship from starboard side using Propulsion

Motors.

@ 18:00 IST Tried 4 different times and finished the trials to approach the

Buoy and finally end up with a minimum distance of 35 meters from

starboard side.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

27-May-2016

@ 07:00 IST started to manoeuvre the ship and approach the buoy from

North-South course and started approaching the Buoy through propulsion

motors.

@ 12:20 IST tried almost 4 times to approach the Buoy as the weather

conditions are rough the ship steering is out of control to maintain a

speed of 1.0 knots and could able to reach a minimum distance of 25

meters from start board side.

@ 14:40 IST Analysed all the alternative options to recover the Buoy and

BPR, realized the swells height around 4.0 meters which rules out the

possibility of lower small boat for recovery of BPR or surface buoy. So the

only alternative is approach the buoy through PM motors and skillful

manoeuvring of the vessel. @ 15:00 IST continuous weather observation

and monitoring and review of weather reports for a clear weatheer

window, for doing the recovery operations. All weather reports suggest a

window which may be possible till Saturday 28th May 2016 then the

winds and swells may pick up further.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

28-May-2016

@ 06:30 IST waited for a clear weather window for BPR and Buoy

Recovery and the swells are at high 3.5 meters and winds around 18

knots, so continued to wait for the clear weather window. For the

operations the most suitable weather is winds <12 knots and swells <2.0

with minimal white caps in the ocean.

@ 14:30 IST Contacted ground station about the situation and the

possibility of recovering the Buoy and BPR. Afternoon we have re

reviewed all the weather forecasts and wind forecasts and realized the

least possibility of a calm weather window.

@ 18:30 IST came up with alternative plans to recover the Buoy before

the regular maintenance schedule and contacted/emailed SAIC for

alternative plans.

@ 20:30 IST decided on a tentative plan for the recovery in the next 12

months and decided to leave the station considering the weather, food

and fuel availability of the Vessel.

@ 21:30 IST leave the station for disembarkation at Tuticorin which is 9

days of transit time.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

29-May-2016

@ All the day weather observation is going on with Winds in the range of

18-28 knots and swells in the range of 3.0-3.5 meters. Started preparing

offloading material list.

@ All the left over mooring is arranged in a single wooden crate box. All

the tools and boxes are arranged and made ready to arrange to ship back

to NIOT.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

30-May-2016

@ Communicated about the ETA with the Office, Return logistics for

sending the material back to NIOT is discussed; also shipping of acoustic

transducer to SAIC has been discussed. Weather observations with wind

speed around 27 knots and swells around 4.5 meters. The vessel speed is

around 2.8 knotsduring high swell periods.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

31-May-2016

@ Return documentation and cruise report draft preparation has been

started. ETA to Tuticorin is 6 June 2016; made all the trucks loading plan

back to Chennai from Tuticorin.

@ 20:00 IST Training programmes and on board student/expert talks on

Topic TRC (Tropical recursive cyclones and how to mitigate and escape

from cyclone and navigational techniques) is discussed and presented.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

01-June-2016

@ 10:30 IST Weather observation and experience of south westerly moon

soon winds with wind speeds ranging between 24-34 knots and swells

ranging from 2.5 - 4.5 meters. Average Vessel speed is 3.4 knots


Topic Upwelling and down welling and its economic importance and

influence of kelvin waves in down welling phenomenon in Arabian sea has

been discussed.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

02-June-2016

@ 10:30 IST Weather observation and experience of south westerly moon

soon winds with wind speeds ranging between 20-32 knots and swells

ranging from 3.0 - 4.5 meters.


Topic Scientific Instruments onboard ORV Sagar Kanya has been

presented by Norinco engineers and followed by Q&A from students.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

03-June-2016

@ 11:30 IST working on cruise report SK-330, and review of all the

information and individual documentations.

@ 14:30 IST coordinating with ground station about the return logistics

and booking trucks to offload the material and send back to NIOT.


10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

@ 17:00 IST All the cruise participants are gathered to have a conclusion

meeting and group photo graph has been taken with Scientific

participants.

04-June-2016

@ 10:30 IST working on cruise report SK-330, and review of all the

information and individual documentations. Collecting all the inputs from

all the cruise participants.




10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

@ 19:00 IST Hosted SK-330 cruise success party in the vessel and efforts

of all the participants, vessel staff were duly acknowledged for the

support and help.

05-June-2016

@ 10:00 IST discussed




10:30 IST, 14:30 IST, 16:30 IST, 18:30 IST.

06-June-2016

@ 09:30 IST Reached Tuticorin port and berthed.

@ 11:30 IST discussed with Agents from Atlantic Shipping Corporation

about the arrangements need for Sign off procedures and Material

offloading.

@ 06:00 IST Sign off procedure of all the scientific participants are

finished and scientific staff are dropped at their requested destinations at

various places in the city.

- - -

Summary of Scientific works done during Cruise SK-330:

1. Deployment of STB-05,was successfully done on 13-May-2016

20:45 IST at the STB-05 location(N 13.50°; E 89.00°).

2. Deployment of STB-04, was successfully done on 17-May-2016

20:15 IST at the STB-04 location (N 10.00°; E 88.50°).





5. Sea Surface sample collection during 4 times a day along the path

during the cruise for sea surface salinity analysis for training and

research purpose of students.

6. On board students training and expert/student talks on various

topics and Tsunami Warning System, Tsunami buoy functioning,

and other scientific equipment on board. Also a visit to various

facilities onboard ORV SagarKanya

7. Conducted CTD analysis at STB-05 and STB-03 Tsunami Buoy

deployed locations to the depth of 400 m for research and training

purpose of students.

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