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Night Diving

Night Diving. We will cover. Why and Who should go Dive Planning Extra Equipment Personal Boat Shore Based Dive Brief & Buddy Checks During the Dive After the Dive. Why go Night Diving?. Underwater life different Challenge, pushing out the envelope

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Night Diving

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  1. Night Diving

  2. We will cover • Why and Who should go • Dive Planning • Extra Equipment • Personal • Boat • Shore Based • Dive Brief & Buddy Checks • During the Dive • After the Dive

  3. Why go Night Diving? • Underwater life different • Challenge, pushing out the envelope • Different procedures, new skills

  4. Who Should Go • Recommended Club Diver (Diver **) • Experienced Diver

  5. Planning • Local Knowledge • Dive the site in daylight • Note hazards & alternate exit point • Lights on shore to aid navigation

  6. Personal Equipment • Torch or Lantern, types, min. one per diver • Back up light recommended • Good batteries • Light sticks • Whistles • Min tank size of 12 l.

  7. Boat Equipment • Lights to be seen by other vessels • Lights to see diver on the surface • Correct use of lights & backups • Shot line light or strobe

  8. Shore Based Equipment • Marking of exit point • Use of ‘Leading Lights’ • Emergency Vehicle • Slip or other boat recovery area

  9. Dive Brief • Correct use of lamps • Procedure if a torch fails • Procedure for lost buddy • Depth and direction / navigation • Beware of looking only at the lit area • Procedure if lost on the surface • Diver recall signals • Extra care by cox’n.

  10. Signals Using Dive Torch O.K. Something wrong (Click on images)

  11. Buddy Check • All the usual checks • Lamps OK? • Compasses OK? • Demonstrate use of lamps

  12. During the Dive • All the normal procedures • Don’t shine in buddies face (or your own) • Check buddy often • Monitor direction constantly • Look all around, not only down

  13. After the Dive • Report to the shore marshal • Complete logs and debrief • Take care in the boat & unloading • Check for gear left behind

  14. Summary • Extra Planning & Equipment • New Skills - Use of lamps • Maintain “Night Vision” • Safety in Boat Handling • Safety & Consideration on Shore

  15. Questions

  16. When may a dive be classified as a ‘Night Dive’? • Between sunset & sunrise • During hours of total darkness • After midnight

  17. When may a dive be classified as a ‘Night Dive’? • Between sunset & sunrise • During hours of total darkness • After midnight

  18. Divers lamps and torches are used to: • Illuminate hand signals • Allow the diver to be seen • Allow the diver to see • All the above

  19. Divers lamps and torches are used to: • Illuminate hand signals • Allow the diver to be seen • Allow the diver to see • All the above

  20. Night diving can be more stressful and result in: • Night blindness • Loss of feeling in the hands • Greater air consumption • Fear of depth

  21. Night diving can be more stressful and result in: • Night blindness • Loss of feeling in the hands • Greater air consumption • Fear of depth

  22. We must not shine lamps directly into other divers eyes, because: • They will see us • Their ‘Night Vision ‘ will be reduced • They will be seen by the cox’n • We will see them

  23. We must not shine lamps directly into other divers eyes, because: • They will see us • Their ‘Night Vision ‘ will be reduced • They will be seen by the cox’n • We will see them

  24. A cox’n MUST carry spare lamps, so that: • A diver, whose lamp has failed may borrow one • The assistant cox’n will have a light of their own • There will always be a light in the boat

  25. A cox’n MUST carry spare lamps, so that: • A diver, whose lamp has failed may borrow one • The assistant cox’n will have a light of their own • There will always be a light in the boat

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