Anchor Ict.ppt

7/23/2019 Anchor Ict.ppt

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ANCHORINGANCHORINGPLANNING & EXECUTIONPLANNING & EXECUTION

Revised May 2007

Lt Cdr K E B!r"


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ANCHORINGANCHORING

INTRO#UCTIONINTRO#UCTION

This lecture aims to teach the

principles of choosing and planning an

anchorage

Anchorages are often used to practice

pilotage techniques It is often necessary to anchor for

operational reasons or to seek shelter


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ANCHORINGANCHORING

CONTENT$CONTENT$ Choosing an Anchorage

Calculation of the amount of cable to use

Planning an anchorage eam marks

!onitoring of position

"#ecution of the Anchorage Plan $%ith somereprise of the &isual Pilotage 'esson(

)eference* )+,$1( Chapter 1+ Page 3-3


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CHOO$ING AN ANCHORAGE % CHOO$ING AN ANCHORAGE % .ACT/)0 T/ " C/0I")".ACT/)0 T/ " C/0I")"

epth of ater $4eight of Tide 54/T6(

7uring the Approach8 the 4/T for that Approach is

used for the 'imiting anger 'ines $''s(

7!inimum safe depth determined by thelo%est4/T

during the stay at the anchorage must beused for the

''s around theanchorage position

'ength o9erall and draught of the ship7The amount of cable a9ailable


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CHOO$ING AN ANCHORAGE % 2CHOO$ING AN ANCHORAGE % 2'ACTOR$ TO BE CON$I#ERE#'ACTOR$ TO BE CON$I#ERE#

ature of the 0eabed : Type of holding ground;7


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CHOO$ING AN ANCHORAGE % (CHOO$ING AN ANCHORAGE % ('ACTOR$ TO BE CON$I#ERE#'ACTOR$ TO BE CON$I#ERE#

The strength and direction of the tidal stream in theanchorage;

7 Thus the direction of approach; Aim to stem the tide

during the approach;7 .rom the tidal and %ind direction select %hich anchor to

use

umber of 0hackles of Cable )equired*7 "quals 2 # depth in fathoms@

7 or "quals 1;, # depth in metres@

$@sing !ABI!! 4/T during the stay(

'ength of one shackle 1,fathoms8 DE feet or 2F metres


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CHOO$ING AN ANCHORAGE % )CHOO$ING AN ANCHORAGE % )

'ACTOR$ TO BE CON$I#ERE#'ACTOR$ TO BE CON$I#ERE#

Calculation of the 0afety 0%inging Circle$00C(

7sed for planning the anchor position

7Circumference may touch the '' dra%nfor the !inimum 4/T during the stay

$$C * Ma+i,!, A,!"t - Ca./e Le"1t -$i3 $a-ety Mar1i" - 4a./e 5200 yards6


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CHOO$ING AN ANCHORAGE % CHOO$ING AN ANCHORAGE % $A'ET8 $9INGING CIRCLE$A'ET8 $9INGING CIRCLE

Safety Swinging

Circle

+Length of Ship

Max Usable Cable

$a-ety $:i"1i"1 Cir4/e s:" ;


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CHOO$ING AN ANCHORAGE % =CHOO$ING AN ANCHORAGE % ='ACTOR$ TO BE CON$I#ERE#'ACTOR$ TO BE CON$I#ERE#

'anding Places $eg* orfolk Island(

0hipping )outes > Pro#imity of /ther &essels

7e%are of anchoring in the !ain Channel

7Possibility e#ists of another ship$s( being anchored

in your desired position $ha9e an alternati9e plan

ready(

7 0hoot up anchorage position and fi# adGacent ships;If going to go to the alternate anchorage position then

make the decision early

The Pro#imity of dangers such as shoal %aters8rocks etc


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1E

$HOOTING UP A $HIP AT ANCHOR$HOOTING UP A $HIP AT ANCHOR


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ANCHORAGE PLANNING % ANCHORAGE PLANNING %

CHART9ORKCHART9ORK

$TEP9I$E PREPARATION O' AN

ANCHORAGE PLAN ON A CHART


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Take your

chart;;;


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ra% ''


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1+

ra% ''

Choose Anchorage

Position

$using the 00C(


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1,

NMT056

NMT

02

NLT 0! NLT0!2

NLT

0"5

N

LT#$#

ra% ''

Choose anchorage ra% Clearing

earings


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NMT056

NMT

02

NLT 0! NLT0!2

NLT

0"5

N

LT#$#

0!!

02!

%ra% ''

Choose anchorageClearing

earings0elect

4eadmark@

and Courses $@Transit if

possible(


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1F

Let go

0!!

02!NM

T056

NMT

02

NLT 0! NLT0!2

NLT

0"5

N

LT#$#

%ra% ''

Choose AnchorageClearing

earings0elect

4eadmark

and Courses"stablish 'et


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1-

NMT056

NMT

02

NLT 0! NLT0!2

NLT

0"5

N

LT#$#

02!

Let go

"0c !c

5c

$c

#c

2c

"c

0!!

ra% ''Choose

AnchorageClearing

earings0elect

4eadmark

and Courses"stablish '

Tide

ote !in

"#pectedepths

.ind

Cablerequired

NMT056

NMT

02

NLT 0! NLT0!2

NLT

0"5

NLT#$#

Let go

"0c !c

5c

$c

#c

2c

"c

"&0

"&0

0&5

wo0!!'0!6(

02!'02!(

ra% ''

Choose AnchorageClearing

earings0elect

4eadmark

and Courses"stablish '

Anchor Ict.ppt

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