Underwater hand signals
Effective communication is the cornerstone of buddy diving. Mastering standard hand signals ensures clarity and safety throughout your dive.
Signal clearly and confirm
Always deliver signals within your buddy’s field of vision and wait for a confirmation response. If a signal is not understood, repeat it slowly or use an alternative method like a slate.
Standardized signals
Using standardized hand signals helps prevent misunderstandings, especially when diving with new buddies or in international locations. Basic signals for 'OK', 'Up', and 'Down' are universal.
Practice making your signals distinct and large enough to be seen from a distance. Avoid rapid, jerky movements that can be misinterpreted or missed in low visibility.
Communication and safety
Safety-related signals, such as 'Low on Air' or 'Problem', must be understood by every member of the dive team. Briefing these signals before entering the water ensures everyone is on the same page.
Maintain regular eye contact with your buddy to check their status. A simple 'OK' signal exchange every few minutes helps build trust and ensures that small issues are caught before they escalate.
Advanced communication
For more complex information, divers can use underwater slates or wet-notes. These tools are invaluable for recording navigation details or discussing equipment adjustments during the dive.
Lighting can also be used for signaling, particularly in night or low-visibility conditions. Ensure you know the specific light signals for attracting attention or indicating an emergency.
Dive-day checklist
Communication checklist
- Review basic hand signals before entry
- Ensure signals are clearly visible to your buddy
- Wait for an 'OK' response to every signal
- Use a slate for complex messages
- Test signaling lights for night dives
General guidance only. Follow your training, the dive operator’s procedures, and each manufacturer’s current instructions.
Ask the dive guide
Personal guidance for your next dive
Describe a dive scenario or an equipment-care question. The guide answers in your language and points you to relevant journal articles.
General educational guidance only. It is not medical advice, emergency instruction or a replacement for training, certification, manufacturer instructions, your operator's briefing or your dive plan.