Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 108/02

Pathfinder Divers BSAC 0161Diver

Propulsion Vehicle

Diver Propulsion

Vehicle

Diver Propulsion Vehicle Diver Propulsion Vehicle

Operator & Maintainer CourseOperator & Maintainer Course

Dive Preparation,Dive Preparation,

Planning, Execution & EtiquettePlanning, Execution & Etiquette

Diver Propulsion Vehicle Diver Propulsion Vehicle

Operator & Maintainer CourseOperator & Maintainer Course

Dive Preparation,Dive Preparation,

Planning, Execution & EtiquettePlanning, Execution & Etiquette

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 208/02

Course AimsDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

• Dive Preparation & PlanningDive Preparation & Planning

• Diving With A DPV [SeaScooter]Diving With A DPV [SeaScooter]

• SeaScooter HandlingSeaScooter Handling

• SeaScooter Dive Problems & HazardsSeaScooter Dive Problems & Hazards

• SeaScooter Etiquette SeaScooter Etiquette

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 308/02

Dive Preparation & PlanningDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Considerations Within The Dive OrganisationConsiderations Within The Dive Organisation

• Rule Of Thirds [Gauged Through Run Time]Rule Of Thirds [Gauged Through Run Time]

• Maximum Distance capableMaximum Distance capable

• Diver Air SupplyDiver Air Supply

• Diver No Stop TimeDiver No Stop Time

• Diver & SeaScooter M.O.D.sDiver & SeaScooter M.O.D.s

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 408/02

Dive Preparation & PlanningDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Considerations Within The Dive OrganisationConsiderations Within The Dive Organisation

• Rate of Descent/AscentRate of Descent/Ascent

• Dive Profile [Avoiding Saw Tooth]Dive Profile [Avoiding Saw Tooth]

• Pre-dive Preparation & Entry MethodsPre-dive Preparation & Entry Methods

• Buddy SystemBuddy System

• Propeller ObstructionsPropeller Obstructions

• Environmental ResponsibilitiesEnvironmental Responsibilities

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 508/02

Diving With A SeaScooterDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Pre-dive PreparationsPre-dive Preparations

• Ensure battery fully chargedEnsure battery fully charged

• Clean seals & O ringsClean seals & O rings

• Assemble & secure latchesAssemble & secure latches

• Test run [5 secs max]Test run [5 secs max]

• Lock triggerLock trigger

• Store upright Store upright

away from direct sunlightaway from direct sunlight

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 608/02

Diving With A SeaScooterDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Shore EntryShore Entry

• Gear up & secure machine [Lock Gear up & secure machine [Lock

trigger] in water/or carry trigger] in water/or carry

to mid waterto mid water

• When in deep water run vehicleWhen in deep water run vehicle

• Caution with silt/sand in shallowsCaution with silt/sand in shallows

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 708/02

Diving With A SeaScooterDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Boat EntryBoat Entry

• Kit up & crew hand SeaScooterKit up & crew hand SeaScooter

• Use floating line to retain Use floating line to retain

SeaScooter during kitting upSeaScooter during kitting up

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 808/02

Diving With A SeaScooterDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Surface UseSurface Use

• Use DSMBUse DSMB

• Use Bright coloured hoodUse Bright coloured hood

• Use StrobeUse Strobe

• Conserve gas/use snorkel only Conserve gas/use snorkel only

during calm conditionsduring calm conditions

• Maintain horizontal positionMaintain horizontal position

• Keep head below waterKeep head below water

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 908/02

Diving With A SeaScooterDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Underwater UseUnderwater Use

• Scooter close to buddyScooter close to buddy

• Clip SeaScooter to BC D RingClip SeaScooter to BC D Ring

for vertical descent/ascentsfor vertical descent/ascents

• Keep arms almost fully extendedKeep arms almost fully extended

• Maintain horizontal attitude Maintain horizontal attitude

with fins pointedwith fins pointed

• Maintain good B&T Maintain good B&T

Too buoyant [downward motion]Too buoyant [downward motion]

Too negative [upward motion]Too negative [upward motion]

• Slower SeaScooter to lead diveSlower SeaScooter to lead dive

• Fin kicking increases speedFin kicking increases speed

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1008/02

Diving With A SeaScooterDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

ManoeuvringManoeuvring

Pivot TurnsPivot Turns

• Hold SeaScooter far out & turnHold SeaScooter far out & turn

Banking TurnsBanking Turns

• Roll body in direction & lift noseRoll body in direction & lift nose

Tow Strap eases natural pivotTow Strap eases natural pivot

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1108/02

Diving With A SeaScooterDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Riding TandemRiding Tandem

• Drains powerDrains power

• Both require excellent B&TBoth require excellent B&T

• Useful if buddys SeaScooter Useful if buddys SeaScooter fails fails

• Buddy may hold:Buddy may hold:

Pilot’s anklesPilot’s ankles

Calves below kneesCalves below knees

CylinderCylinder

First stage First stage [do not touch cylinder valve][do not touch cylinder valve]

Upper BC Upper BC

Use tow strapUse tow strap

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1208/02

Diving With A SeaScooterDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Exit ProceduresExit Procedures

• Lock triggerLock trigger

• Secure SeaScooter to RIB, orSecure SeaScooter to RIB, or

hand inboard firsthand inboard first

• Remove SCUBA equipment Remove SCUBA equipment

• Retrieve SeaScooter if req’dRetrieve SeaScooter if req’d

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1308/02

Diving With A SeaScooterDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Post-dive ProceduresPost-dive Procedures

• Freshwater Rinse & wipe dryFreshwater Rinse & wipe dry

• Recharge batteryRecharge battery

• Keep out of direct sunlightKeep out of direct sunlight

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1408/02

Shelf or wall – Difficult to

control

descent

ascent

rates

Shot line Preferred Route – With Scooter non running

Check depth Check breathing gas Check octopus/AS Check buoyancy

Unclip Scooter/OK to continue/

Scooter & Avoid Saw Tooth Profile

Buoyancy control

Clear ears

Stay together

Clip Scooter to BC/ Okay to descend

SeaScooter Handling – DescentSeaScooter Handling – DescentDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1508/02

Stay togetherMonitor conditionsMonitor depth of planned dive & observe Scooter M.O.D.Monitor breathing gasMonitor buddy Keep to main dive planCaution with Scooter running distance - Separation procedure

If unhappy at any point - abort the dive Leave Scooter for CBL/AS unless highly experienced

SeaScooter Handling – The DiveSeaScooter Handling – The DiveDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1608/02

Signal OK to surface cover/Surface Scooter To Shore or Top Cover Boat/Unclip Scooter & recharge maintain

Signal OK to buddy

Stay together

Buoyancy control

Release triggers & stop motor/clip to BC/OK/UP

6m check depth

Controlled 1 min. ascent to surface

Buoyancy control

SeaScooter Handling – AscentSeaScooter Handling – AscentDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Caution with shelving wall ascent – Monitor ascent rate & consider deco levels

Preferred

ascent method

If Scootering on surface, inflate DSMB

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1708/02

Dive Problems & HazardsDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Dealing With SeaScooter Vehicle Failure During DiveDealing With SeaScooter Vehicle Failure During Dive

• Caused By: Caused By:

Flooding [Becomes negatively buoyant]Flooding [Becomes negatively buoyant]

Propeller jamPropeller jam

• Actions:Actions:

Stop motor runningStop motor running

Clip scooter to BC D Ring & tow to entry pointClip scooter to BC D Ring & tow to entry point

Ride tandem [use DSMB on surface]Ride tandem [use DSMB on surface]

Use spare DSMB & send to surfaceUse spare DSMB & send to surface

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1808/02

Dive Problems & HazardsDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Dealing With Runaway SeaScooter During DiveDealing With Runaway SeaScooter During Dive

• Caused By:Caused By:

Jammed triggerJammed trigger

Trigger malfunctionTrigger malfunction

• Actions:Actions:

Stop runaway [drive nose to solid surface, or bottom if Stop runaway [drive nose to solid surface, or bottom if safe to do so] – run down battery if 2/3 or more through safe to do so] – run down battery if 2/3 or more through divedive

Attempt to clear trigger jam, or jam propellerAttempt to clear trigger jam, or jam propeller

Attach to shotlineAttach to shotline

Look up check clear of divers, aim at surface & let goLook up check clear of divers, aim at surface & let go

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 1908/02

Dive Problems & HazardsDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Dealing With Strong Currents During DiveDealing With Strong Currents During Dive

• Scooter against current & return with currentScooter against current & return with current

• Consider distance to travel should SeaScooter failConsider distance to travel should SeaScooter fail

• Do not exceed planned dive parametersDo not exceed planned dive parameters

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 2008/02

Dive Problems & HazardsDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Planning Against Saw Tooth Profiles During DivePlanning Against Saw Tooth Profiles During Dive

• Be realistic & avoid over ambitious planningBe realistic & avoid over ambitious planning

• If penetrating wreck, leave SeaScooter to entry pointIf penetrating wreck, leave SeaScooter to entry point

Descend/AscendDescend/AscendDescend/AscendDescend/Ascend

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 2108/02

Dive Problems & HazardsDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Dealing With Out-Of-Air Emergency During DiveDealing With Out-Of-Air Emergency During Dive

• Danger – fast moving further apart:Danger – fast moving further apart:

Co-ordinate pre-dive with buddyCo-ordinate pre-dive with buddy

• Actions:Actions:

Get air to recipient & AscendGet air to recipient & Ascend

If both operators well trained – retain [clip to BC & If both operators well trained – retain [clip to BC & Prepare to discard during ascent] Prepare to discard during ascent]

On surface, if safe to do so – switch to snorkel & release On surface, if safe to do so – switch to snorkel & release DSMB during scooteringDSMB during scootering

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 2208/02

SeaScooter EtiquetteDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Diver Etiquette With The SeaScooterDiver Etiquette With The SeaScooter

SeaScooters have been banned in some areas due to lack of SeaScooters have been banned in some areas due to lack of common sense & inconsiderate usecommon sense & inconsiderate use

Minimise damage to environment & other divers by: Minimise damage to environment & other divers by:

• Use courtesy around other divers – maintain good distanceUse courtesy around other divers – maintain good distance

• Use minimal speed & wide turning arcsUse minimal speed & wide turning arcs

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 2308/02

SeaScooter EtiquetteDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

Diver Etiquette With The SeaScooter [Cont’d]Diver Etiquette With The SeaScooter [Cont’d]

• Maintain good distance between SeaScooter Maintain good distance between SeaScooter & Wreck/Reef subject & Wreck/Reef subject

• Point fin blades uppermost & do not kick fins Point fin blades uppermost & do not kick fins close to bottom close to bottom

• Caution with prop wash stirring bottom Caution with prop wash stirring bottom

Diving Equipment &

Diving Signals

Diving Equipment &

Diving Signals

OT2 2408/02

SummaryDiver

Propulsion Vehicle

Diver Propulsion

Vehicle

• Factoring Within The Dive OrganisationFactoring Within The Dive Organisation

• Handling Safely During DivesHandling Safely During Dives

• Dealing With Hazards Encountered During DivesDealing With Hazards Encountered During Dives

• Consideration To Other Divers & The Environment Consideration To Other Divers & The Environment