■Gauges
Choose gauges with luminous displays that are easy to read in low light conditions.
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■Whistle / Horn
Attach a whistle or horn to your BCD.
Visibility on the surface is limited at night. In an emergency, use a whistle or horn to signal your position to other divers or the boat crew.
It is also effective for alerting divers who are too far away to hear your voice.
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■Main Light / Backup Light
Dive lights are the most important equipment for night and limited-visibility diving.
They are used not only to observe marine life, but also for communication in place of hand signals.
Use a dedicated dive light designed to withstand underwater pressure and impact.
All handheld lights should be equipped with a wrist strap long enough to allow you to secure it if dropped.
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The main light is the primary handheld light used during the dive.
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The backup light is a spare handheld light used if the main light fails.
Choose a compact and easy-to-carry model.
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Illumination range and brightness vary depending on the model.
Select a main light that provides a wide beam and sufficient intensity for distance viewing.
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