BSAC AI Course GozoBSAC AI Course Gozo

Underwater Search Underwater Search TechniquesTechniques

A brief odyssey by Darin Edmunds

BSAC AI Course GozoBSAC AI Course Gozo

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

BSAC AI Course GozoBSAC AI Course Gozo

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

BSAC AI Course GozoBSAC AI Course Gozo

Semi-circular search

Snag method

Adaptations…Adaptations…

BSAC AI Course GozoBSAC AI Course Gozo

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

Increasing saw tooth profile

BSAC AI Course GozoBSAC AI Course Gozo

Circular Search… SummaryCircular Search… SummaryTechniques

BSAC AI Course GozoBSAC AI Course Gozo

The EndThe End

Thank you