Speak Diver: Hand Signals & Your First Dive Computer
Two unglamorous things quietly upgrade every dive trip: a shared vocabulary underwater, and a computer you actually understand. I brief mixed-nationality groups most mornings, and I can tell within one signal review who's going to have an easy week. Give both topics ten minutes before you fly.
Table of Contents
- The signals that actually get used
- The local dialect
- Three habits beat a big vocabulary
- Choosing your first dive computer
The signals that actually get used
The core set, the ones I check every single briefing: OK is the thumb-and-finger circle, both a question and an answer, and you always respond to it. Problem is a flat hand rocking side to side, then a point at the issue. Up and down are thumbs, and they mean ascend and descend, never "good" or "bad"; that mix-up causes real confusion. Low on air is a fist to the chest. Out of air is a hand slashing across the throat. Those last two you drill until they're reflex, because the moment you need them is not a thinking moment. Add safety stop, a flat hand over three fingers, and look, two fingers to your eyes then a point, and you're conversational. Signals matter most on unfamiliar house reefs — Arung Hayat is one of the quieter ones to practise on.
The local dialect
Region-specific extras earn their keep here. Vertical palms doing a wall-of-fish wiggle means barracuda. A fist on the forehead is the bumphead parrotfish. The flat-hand fin on the forehead is, everywhere on Earth, a shark, and at Sipadan you'll use it more than anywhere you've dived. Guides each have a dialect; mirror your guide's version from the briefing rather than insisting on yours. Underwater is not the venue for grammar debates.
Three habits beat a big vocabulary
Make signals big and deliberate rather than fast. Confirm every signal you receive, every time. And agree the day's site-specific signals before the giant stride, not after. Groups that do these three things communicate better with ten signals than sloppy groups do with fifty.
Choosing your first dive computer
Rental gear here is decent, but the computer is the one item worth owning early: it learns your dive history and you learn its screens. What actually matters when buying:
- Readability first. If depth, no-deco time and ascent rate aren't parseable in one glance, nothing else on the spec sheet matters. Big clear segments or a clean colour screen beat feature lists.
- Nitrox support. Effectively universal now, but confirm it. Pairing it with an enriched-air certification makes a three-dive Sipadan day noticeably friendlier.
- Conservatism you can at least understand. Algorithms differ. What you need is to know how yours behaves on the third dive of the day, because here there will be a third dive.
- Battery reality. A user-changeable coin cell versus a rechargeable is a lifestyle decision. Rechargeables are lovely until day nine of a remote trip and a missing cable.
- Skip for now: air integration, digital compasses and multi-gas modes are upgrades, not requirements, on a first unit.
Whatever you buy, dive it at home before the trip and keep the manual PDF on your phone. Our equipment page covers the bring-versus-rent question for everything else, or ask us what makes sense for your itinerary.