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Light Salvage

Light Salvage. Objectives. Identify the maximum weight for light salvage. State three areas of salvage organization and describe techniques for each. Describe proper techniques for use of a lift bag. Describe proper techniques for lifting an imbedded object.

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Light Salvage

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  1. Light Salvage

  2. Objectives • Identify the maximum weight for light salvage. • State three areas of salvage organization and describe techniques for each. • Describe proper techniques for use of a lift bag. • Describe proper techniques for lifting an imbedded object. • State the primary requirement for any knot, and identify three common knots and their uses. • Discuss hazards which might be encountered during salvage operations.

  3. Main Points • Maximum weight for light salvage • Salvage equipment • Search patterns • Preparing to search • Rigging • Hazards • Emergency Procedures

  4. Maximum Weight • Weight for light Salvage • 100lbs

  5. Salvage Equipment • Float Marker • Compass Board • Distance Measuring Devices • Air Supply • Lift Bag

  6. Lift Bags • Types • Commercial • B.C.D. • Plastic garbage bag inside a mesh goody bag. • Selection Criteria • Capacity should be approx. the same as weight of the object. • Dump mechanism • Ease of use • Availability

  7. Lift Bags cont. • Techniques • Use a separate air source not your reg. • Fill slowly and test frequently. • Add just enough air to be neutral or slightly negative • Release an out of control object. • Diver position • Avoid directly above or below bag/object

  8. Search Patterns • Selection Criteria • Size of object • Size of area to be searched • Environmental conditions • Depth • Wind • Current • Topography • Marine Life • Equipment • Personnel

  9. Search Patterns cont. • Types of Patterns • Expanding circles • Expanding Squares • Grid

  10. Search Patterns cont. • Preparing to search • Buddy Discussion • Dry Practice • Constant Visualization ( Diagram on a slate)

  11. Search Techniques cont. • Running the pattern • Each leg overlaps previous leg in terms of visibility • Run each leg in both directions as required by terrain • One buddy watches compass while other buddy searches • Start deep and work shallow

  12. Rigging • Embedded object • Tidal winch • Surge winch • Knots • Primary requirement • Types • Bowline • Sheet bend • Square knot / reef knot

  13. Hazards • Object itself • Tools/equipment • Depth • Narcosis • DCI • Air consumption • Environment • Marine Life • Hypothermia • Water Movement • Limited Visibility

  14. Hazards cont. • Using your own BC as a lift bag • Ideally, never use your BC as a lift. • Should it be necessary, • Do so only as a last resort • Use the minimum air necessary • Be prepared to dump air immediately • USE EXTREME CARE WHEN USING YOUR BC AS A LIFT BAG!

  15. Emergency Procedures • Establish beforehand

  16. Have We Covered • Maximum weight for light salvage • Salvage equipment • Search patterns • Preparing to search • Rigging • Hazards • Emergency Procedures

  17. Are You Able to • Identify the maximum weight for light salvage. • State three areas of salvage organization and describe techniques for each. • Describe proper techniques for use of a lift bag. • Describe proper techniques for lifting an imbedded object. • State the primary requirement for any knot, and identify three common knots and their uses. • Discuss hazards which might be encountered during salvage operations.

  18. Conclusion • Preparation, practice and team work are the keys to successful search and salvage missions.

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