Night diving
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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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Night diving

Night Diving


We will cover

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

Why go Night Diving?

  • Underwater life different

  • Challenge, pushing out the envelope

  • Different procedures, new skills


Who should go

Who Should Go

  • Recommended Club Diver (Diver **)

  • Experienced Diver


Planning

Planning

  • Local Knowledge

  • Dive the site in daylight

  • Note hazards & alternate exit point

  • Lights on shore to aid navigation


Personal equipment

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.


Boat equipment

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


Shore based equipment

Shore Based Equipment

  • Marking of exit point

  • Use of ‘Leading Lights’

  • Emergency Vehicle

  • Slip or other boat recovery area


Dive brief

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.


Signals using dive torch

Signals Using Dive Torch

O.K.

Something wrong

(Click on images)


Buddy check

Buddy Check

  • All the usual checks

  • Lamps OK?

  • Compasses OK?

  • Demonstrate use of lamps


During the dive

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


After the dive

After the Dive

  • Report to the shore marshal

  • Complete logs and debrief

  • Take care in the boat & unloading

  • Check for gear left behind


Summary

Summary

  • Extra Planning & Equipment

  • New Skills - Use of lamps

  • Maintain “Night Vision”

  • Safety in Boat Handling

  • Safety & Consideration on Shore


Questions

Questions


When may a dive be classified as a night dive

When may a dive be classified as a ‘Night Dive’?

  • Between sunset & sunrise

  • During hours of total darkness

  • After midnight


When may a dive be classified as a night dive1

When may a dive be classified as a ‘Night Dive’?

  • Between sunset & sunrise

  • During hours of total darkness

  • After midnight


Divers lamps and torches are used to

Divers lamps and torches are used to:

  • Illuminate hand signals

  • Allow the diver to be seen

  • Allow the diver to see

  • All the above


Divers lamps and torches are used to1

Divers lamps and torches are used to:

  • Illuminate hand signals

  • Allow the diver to be seen

  • Allow the diver to see

  • All the above


Night diving can be more stressful and result in

Night diving can be more stressful and result in:

  • Night blindness

  • Loss of feeling in the hands

  • Greater air consumption

  • Fear of depth


Night diving can be more stressful and result in1

Night diving can be more stressful and result in:

  • Night blindness

  • Loss of feeling in the hands

  • Greater air consumption

  • Fear of depth


We must not shine lamps directly into other divers eyes because

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


We must not shine lamps directly into other divers eyes because1

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


A cox n must carry spare lamps so that

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


A cox n must carry spare lamps so that1

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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