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Diving Equipment & Diving Signals OT2 1 08/02 Pathfinder Divers BSAC 0161 Diver Propulsion Vehicle Operator & Maintainer Course Dive Preparation, Planning,

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Presentation on theme: "Diving Equipment & Diving Signals OT2 1 08/02 Pathfinder Divers BSAC 0161 Diver Propulsion Vehicle Operator & Maintainer Course Dive Preparation, Planning,"— Presentation transcript:

1 Diving Equipment & Diving Signals OT2 1 08/02 Pathfinder Divers BSAC 0161 Diver Propulsion Vehicle Operator & Maintainer Course Dive Preparation, Planning, Execution & Etiquette Diver Propulsion Vehicle Operator & Maintainer Course Dive Preparation, Planning, Execution & Etiquette

2 Diving Equipment & Diving Signals OT2 2 08/02 Course Aims Diver Propulsion Vehicle Dive Preparation & Planning Dive Preparation & Planning Diving With A DPV [SeaScooter] Diving With A DPV [SeaScooter] SeaScooter Handling SeaScooter Handling SeaScooter Dive Problems & Hazards SeaScooter Dive Problems & Hazards SeaScooter Etiquette SeaScooter Etiquette

3 Diving Equipment & Diving Signals OT2 3 08/02 Dive Preparation & Planning Diver Propulsion Vehicle Considerations Within The Dive Organisation Rule Of Thirds [Gauged Through Run Time] Rule Of Thirds [Gauged Through Run Time] Maximum Distance capable Maximum Distance capable Diver Air Supply Diver Air Supply Diver No Stop Time Diver No Stop Time Diver & SeaScooter M.O.D.s Diver & SeaScooter M.O.D.s

4 Diving Equipment & Diving Signals OT2 4 08/02 Dive Preparation & Planning Diver Propulsion Vehicle Considerations Within The Dive Organisation Rate of Descent/Ascent Rate of Descent/Ascent Dive Profile [Avoiding Saw Tooth] Dive Profile [Avoiding Saw Tooth] Pre-dive Preparation & Entry Methods Pre-dive Preparation & Entry Methods Buddy System Buddy System Propeller Obstructions Propeller Obstructions Environmental Responsibilities Environmental Responsibilities

5 Diving Equipment & Diving Signals OT2 5 08/02 Diving With A SeaScooter Diver Propulsion Vehicle Pre-dive Preparations Ensure battery fully charged Ensure battery fully charged Clean seals & O rings Clean seals & O rings Assemble & secure latches Assemble & secure latches Test run [5 secs max] Test run [5 secs max] Lock trigger Lock trigger Store upright Store upright away from direct sunlight away from direct sunlight

6 Diving Equipment & Diving Signals OT2 6 08/02 Diving With A SeaScooter Diver Propulsion Vehicle Shore Entry Gear up & secure machine [Lock Gear up & secure machine [Lock trigger] in water/or carry trigger] in water/or carry to mid water to mid water When in deep water run vehicle When in deep water run vehicle Caution with silt/sand in shallows Caution with silt/sand in shallows

7 Diving Equipment & Diving Signals OT2 7 08/02 Diving With A SeaScooter Diver Propulsion Vehicle Boat Entry Kit up & crew hand SeaScooter Kit up & crew hand SeaScooter Use floating line to retain Use floating line to retain SeaScooter during kitting up SeaScooter during kitting up

8 Diving Equipment & Diving Signals OT2 8 08/02 Diving With A SeaScooter Diver Propulsion Vehicle Surface Use Use DSMB Use DSMB Use Bright coloured hood Use Bright coloured hood Use Strobe Use Strobe Conserve gas/use snorkel only Conserve gas/use snorkel only during calm conditions during calm conditions Maintain horizontal position Maintain horizontal position Keep head below water Keep head below water

9 Diving Equipment & Diving Signals OT2 9 08/02 Diving With A SeaScooter Diver Propulsion Vehicle Underwater Use Scooter close to buddy Scooter close to buddy Clip SeaScooter to BC D Ring Clip SeaScooter to BC D Ring for vertical descent/ascents for vertical descent/ascents Keep arms almost fully extended Keep arms almost fully extended Maintain horizontal attitude Maintain horizontal attitude with fins pointed with 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 dive Slower SeaScooter to lead dive Fin kicking increases speed Fin kicking increases speed

10 Diving Equipment & Diving Signals OT /02 Diving With A SeaScooter Diver Propulsion Vehicle Manoeuvring Pivot Turns Hold SeaScooter far out & turn Hold SeaScooter far out & turn Banking Turns Roll body in direction & lift nose Roll body in direction & lift nose Tow Strap eases natural pivot

11 Diving Equipment & Diving Signals OT /02 Diving With A SeaScooter Diver Propulsion Vehicle Riding Tandem Drains power Drains power Both require excellent B&T Both require excellent B&T Useful if buddys SeaScooter fails Useful if buddys SeaScooter fails Buddy may hold: Buddy may hold: Pilot’s ankles Pilot’s ankles Calves below knees Calves below knees Cylinder Cylinder First stage [do not touch cylinder valve] First stage [do not touch cylinder valve] Upper BC Upper BC Use tow strap Use tow strap

12 Diving Equipment & Diving Signals OT /02 Diving With A SeaScooter Diver Propulsion Vehicle Exit Procedures Lock trigger Lock trigger Secure SeaScooter to RIB, or Secure SeaScooter to RIB, or hand inboard first hand inboard first Remove SCUBA equipment Remove SCUBA equipment Retrieve SeaScooter if req’d Retrieve SeaScooter if req’d

13 Diving Equipment & Diving Signals OT /02 Diving With A SeaScooter Diver Propulsion Vehicle Post-dive Procedures Freshwater Rinse & wipe dry Freshwater Rinse & wipe dry Recharge battery Recharge battery Keep out of direct sunlight Keep out of direct sunlight

14 Diving Equipment & Diving Signals OT /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 – Descent Diver Propulsion Vehicle

15 Diving Equipment & Diving Signals OT /02 !Stay together !Monitor conditions !Monitor depth of planned dive & observe Scooter M.O.D. !Monitor breathing gas !Monitor buddy !Keep to main dive plan !Caution 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 Dive Diver Propulsion Vehicle

16 Diving Equipment & Diving Signals OT /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 – Ascent Diver Propulsion Vehicle !Caution with shelving wall ascent – Monitor ascent rate & consider deco levels !Preferred ascent method ! If Scootering on surface, inflate DSMB

17 Diving Equipment & Diving Signals OT /02 Dive Problems & Hazards Diver Propulsion Vehicle Dealing With SeaScooter Vehicle Failure During Dive Caused By: Caused By: Flooding [Becomes negatively buoyant] Flooding [Becomes negatively buoyant] Propeller jam Propeller jam Actions: Actions: Stop motor running Stop motor running Clip scooter to BC D Ring & tow to entry point Clip 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 surface Use spare DSMB & send to surface

18 Diving Equipment & Diving Signals OT /02 Dive Problems & Hazards Diver Propulsion Vehicle Dealing With Runaway SeaScooter During Dive Caused By: Caused By: Jammed trigger Jammed trigger Trigger malfunction Trigger malfunction Actions: Actions: Stop runaway [drive nose to solid surface, or bottom if safe to do so] – run down battery if 2/3 or more through dive Stop runaway [drive nose to solid surface, or bottom if safe to do so] – run down battery if 2/3 or more through dive Attempt to clear trigger jam, or jam propeller Attempt to clear trigger jam, or jam propeller Attach to shotline Attach to shotline Look up check clear of divers, aim at surface & let go Look up check clear of divers, aim at surface & let go

19 Diving Equipment & Diving Signals OT /02 Dive Problems & Hazards Diver Propulsion Vehicle Dealing With Strong Currents During Dive Scooter against current & return with current Scooter against current & return with current Consider distance to travel should SeaScooter fail Consider distance to travel should SeaScooter fail Do not exceed planned dive parameters Do not exceed planned dive parameters

20 Diving Equipment & Diving Signals OT /02 Dive Problems & Hazards Diver Propulsion Vehicle Planning Against Saw Tooth Profiles During Dive Be realistic & avoid over ambitious planning Be realistic & avoid over ambitious planning If penetrating wreck, leave SeaScooter to entry point If penetrating wreck, leave SeaScooter to entry point Descend/AscendDescend/Ascend

21 Diving Equipment & Diving Signals OT /02 Dive Problems & Hazards Diver Propulsion Vehicle Dealing With Out-Of-Air Emergency During Dive Danger – fast moving further apart: Danger – fast moving further apart: Co-ordinate pre-dive with buddy Co-ordinate pre-dive with buddy Actions: Actions: Get air to recipient & Ascend Get air to recipient & Ascend If both operators well trained – retain [clip to BC & Prepare to discard during ascent] If both operators well trained – retain [clip to BC & Prepare to discard during ascent] On surface, if safe to do so – switch to snorkel & release DSMB during scootering On surface, if safe to do so – switch to snorkel & release DSMB during scootering

22 Diving Equipment & Diving Signals OT /02 SeaScooter Etiquette Diver Propulsion Vehicle Diver Etiquette With The SeaScooter SeaScooters have been banned in some areas due to lack of common sense & inconsiderate use 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

23 Diving Equipment & Diving Signals OT /02 SeaScooter Etiquette Diver Propulsion Vehicle Diver Etiquette With The SeaScooter [Cont’d] Maintain good distance between SeaScooter & Wreck/Reef subjectMaintain good distance between SeaScooter & Wreck/Reef subject Point fin blades uppermost & do not kick fins close to bottomPoint fin blades uppermost & do not kick fins close to bottom Caution with prop wash stirring bottomCaution with prop wash stirring bottom

24 Diving Equipment & Diving Signals OT /02 Summary Diver Propulsion Vehicle Factoring Within The Dive Organisation Factoring Within The Dive Organisation Handling Safely During Dives Handling Safely During Dives Dealing With Hazards Encountered During Dives Dealing With Hazards Encountered During Dives Consideration To Other Divers & The Environment Consideration To Other Divers & The Environment


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