The NAUI Diving Hand Signals are standard in the United States diving community and are usually recognized in other countries as well.

• A. False
• B. Unknown
• C. True
• D. Sometimes

Answer: (C)

Underwater communication depends on a shared set of hand signals because talking isn’t possible with a mask and regulator. NAUI’s hand signals are taught as the standard in the US diving community, and because diving is global, these signals are commonly recognized in other countries as well. They provide a universal way for divers to convey essential information—like indicating OK, danger, or the need to ascend—across different agencies and backgrounds. While some local operators may add or adapt signals, the core gestures are widely understood, helping to maintain safety and coordination underwater.