The method is a dusk briefing, a working primary and backup light, and a buddy close enough to see a hand signal in the beam. Navigation is simpler: out and back on a known heading, or a descent line.
If the site is unfamiliar by day, it is the wrong night site.
Steps
- Dive the site by day first
Night is a lighting change, not a new map.
A house reef beats a famous name.
- Check both lights on the boat
Plus a tank glow stick if the operator uses them.
A dead backup is a cancelled dive.
- Descend on a line or a known slope
No mid-water “we’ll find it.”
Hold the buddy’s light in peripheral vision.
- Move slowly, beam down and in
Do not spotlight eyes or other divers’ vision.
A thin beam for looking, a flood for the buddy.
- Turn with more gas than by day
Exits take longer in the dark.
The first confused person ends the dive.
- Surface with an SMB if the boat expects it
Night boat traffic is a prop problem.
Stay in the agreed light pattern.
Skills
- Beam discipline — Where the light rests is where the buddy looks.
- Close buddy — An arm’s length culture, not a 10 m day habit.
- Night buoyancy — Without a horizon, the computer and lungs do more work.
- Simple navigation — Out-and-back, not a new square.
- Animal distance — Night creatures are not props.
Progression
- Dusk dive — A halfway step.
- House-reef night — The proper first night.
- Famous night products (Kona, certain Red Sea reefs) — After the house reef is boring.
- Never first-time wreck at night — Combine chapters only on paper.
Common mistakes
- First dive of the trip at night — Jet lag plus dark is a known bad mix.
- Following a lionfish into a hole — A classic glove-and-spine story.
- Strobe in a turtle’s face — Etiquette and, increasingly, a fine.
- Surfacing off the line without a light up — How boats and people meet badly.
The method is a known reef and two working lights. Darkness is not a personality upgrade.