• Plan around wind. Bora can make exposed sites unsafe quickly, and jugo can add swell and drop visibility.
• If diving independently, verify whether you need an individual authorisation and follow buoy and flag marking expectations.
• In parks, follow zone rules, depth limits, and timing restrictions (for example, night diving bans in some areas).
• Treat wrecks as sharp, silt-prone environments. Use a torch, carry a cutting tool, and avoid penetration unless trained and guided.
• Use conservative surface protocols in summer: strong boat traffic means SMB discipline and tight group control.

Croatia has hyperbaric capability in coastal medical centers and larger cities. For any suspected DCI, call 112 and state it is a diving emergency, then contact your diving insurance provider for evacuation and chamber coordination. Do not self-diagnose and drive long distances without medical advice. Carry your insurance card and passport details, and keep emergency numbers in your phone before the first dive day.

• Do not take anything: shells, artifacts, or historical items. Cultural heritage is protected and removal is illegal.
• Follow strict no-touch and no-disturbance rules in parks and on reefs. Avoid harassing octopus or fish for photos.
• Protect Posidonia seagrass: do not anchor on it, and maintain buoyancy over seagrass meadows.
• Use reef-safe sunscreen and pack out trash. If you see marine debris, removing it is one of the few 'take' actions that is encouraged.
• Respect local fishing regulations and never use spearguns in protected areas where prohibited.