Skills & Training
Scuba hand signals: the essentials to agree with your buddy
Basic hand signals are largely the same across training agencies, but details vary — so agree them with your buddy before you descend. Divers Alert Network notes common signals: a closed fist to the chest for 'low on air', a slash across the throat for 'out of air', pointing to your buddy's alternate air source for 'need air'. Air-pressure signals vary most.
By 71 Guardians · Published 19 Oct 2026
Which signals matter most?
- OK: thumb and forefinger forming a circle (some divers use other forms — agree yours).
- Low on air: a closed fist held to the chest.
- Out of air: a slashing motion across the throat.
- Need air: point to your buddy's alternate air source.
- Up: thumb up — it means 'go up', not 'great'.
Why agree signals before every dive?
DAN puts it simply: an emergency is no time to guess what someone means. Review signals during dive planning, especially with a new buddy. Air-pressure signals vary so much that many guides simply ask you to show your gauge.
Frequently asked questions
Does thumbs up mean OK underwater?
No — thumbs up means 'ascend'. Use the OK sign for OK.
Are signals different in technical diving?
Technical and cave divers often adapt them; DAN notes one-handed versions are common in some settings.
Questions before you dive with us?
Message our team on WhatsApp — we're divers in Hurghada and happy to help.
Chat with us on WhatsAppSources
- What's That You Say? — Alert Diver — Divers Alert Network (DAN)