Night Diving

1
Night Diving

• Why dive at night?
• Special equipment
• Night diving procedures
• Overview of night dive

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Night DivingReasons

• Curiosity - offers a certain mystique and
  fascination
• Nocturnal marine life
• A new look at a familiar site
• Additional chance to dive
• Night diving allows you to see the natural colors
  of organisms by providing artificial light

3
Night DivingReasons

• Bioluminescence
• The light produced by a chemical reaction from an
  organism which is transferred to light energy.

4
Night DivingLights

• Types of Lights
• Disposable battery or rechargeable
• Different types of handles

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Night Diving Lights

• Lights
• Primary and Backup light

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Night DivingLight Use

• Keep lights off when underway
• Make sure light is on when entering water
• DO NOT point in others eyes
• To gain attention
• U/W Hand signals
• Surface signals
• Turn light off when not in use.
• Light maintenance

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KEY LARGO

• Each diver will be required to supply four new
  C batteries for your USF issued light.

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Night DivingLight Stick

• Each diver should be equipped with a light stick.
• Battery powered or chemical stick
• Allows for a visual above and below water

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Night DivingUnderwater Strobe Light

• Serves as visual reference for the descent line
  and the entry/exit point.

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Night Diving Procedures

• Select a familiar dive site that is easy to
  navigate.
• Plan your entry at dusk
• Reduce the distance you swim

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Night Diving Procedures

• Remain close to your buddy
• Note any special features on your buddy as well
  as your group leader.
• Decide who will lead and who will follow
• Determine what to do in the event you become
  separated.

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Night Diving Procedures

• Monitor Air Supply
• Control Anxiety
• Stop, Breathe, Think, Act

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Overview of Night Dive Key Largo

• We will be diving on a site dived earlier that
  day
• The water temperature will not change
  significantly
• Topside conditions will have a tendency to be
  cool- bring something warm to wear for the return
  trip.
• Do not turn your lights or lightsticks on while
  the vessel is underway
• Stay with your buddy and your group
• Your dive leader will review additional emergency
  procedures prior to the dive

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Night Diving Key Largo

• There will limited time between afternoon dives
  and night dives 1 hour max. - bring food for
  between dives
• Between dives remove only your tanks
• After the night dive stow gear in locker
• Eat dinner

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Night Diving Key Largo

• Spaghetti, sauce, meatballs and bread will be
  provided
• You will need to provide a beverage salad if
  desired
• Dont be late get a good nights sleep