bsac ai course gozo underwater search techniques a brief odyssey by darin edmunds

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Underwater Search Underwater Search TechniquesTechniques

A brief odyssey by Darin Edmunds

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About searching underwater…About searching underwater…WaterWeatherDivers

Swim linesCircularTowedSnag lineJackstayGrid

BottomFlatUndulatingSloping

SizeColourFragility

ITVO?GPS coordsTransits

RopesBoatsFloats

Open WaterShoreSize

• ConditionsConditions• HydrologyHydrology• Search ItemSearch Item• EquipmentEquipment• PositionPosition• AreaArea• TechniquesTechniques

Considerations

The Circular SearchThe Circular Search

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Circular Search - SetupCircular Search - Setup• Essential Equipment

Shot line (12-15mm)

Shot Weight (15-25kg)

Buoy (50Kg buoyancy)

• Searches must be 100% Data line/marker

Swim line

Overlapping vision/touch

Techniques

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Semi-circular search

Snag method

Adaptations…Adaptations…

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Unsuitability……Unsuitability……Non-tidal search area30m radius limit*Not suitable for slopes*

Increasing saw tooth profile

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Circular Search… SummaryCircular Search… SummaryTechniques

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The EndThe End

Thank you