Plan Cayman wall dives conservatively. Clear water can make 30 m feel shallow, so agree on maximum depth, gas turn pressure, and ascent rate before dropping over a wall. Carry an SMB, especially from boats and shore drifts. Use nitrox to manage repetitive profiles, not to push limits. Avoid solo freediving and never practice breath-hold skills without a trained buddy. Respect operator decisions during northers, tropical waves, and storm season. After multi-day diving, leave adequate no-fly time before inter-island or international flights.

Grand Cayman has the main hospital and the country's recompression chamber. Cayman Brac has local medical support, while Little Cayman is much more limited, so serious incidents may require evacuation. Bring prescription medication, seasickness medication if needed, and documentation for dive insurance. For suspected decompression illness, oxygen, emergency activation, and rapid medical consultation matter more than debating symptoms on the dock.

Do not wear gloves while diving or snorkeling, do not touch coral or marine life, do not take marine life while scuba diving, do not take coral or sponges, and do not anchor on coral. Use public moorings according to size and weather guidance. Wildlife Interaction Zones at Stingray City and the Sandbar are regulated, and commercial vessels must follow license conditions. Report damaged moorings, pollution, and marine offences to the Department of Environment or emergency services when urgent.