Yap Main Islands

Water and Boat Decisions

• Ask guides about the specific tide, channel route, weather, skill group, evacuation time and permission before every departure. Mi'l Channel can have strong, changing currents and opposing flows. Yap Divers, Mi'l Channel
• Outer-reef walls can be exposed; a calm seasonal average cannot certify the day's route. Carry a computer and appropriate SMB, stay within certification limits, follow conservatively set depth/air/time plans, and allow adequate surface intervals. Yap Divers, world-class diving Divers Alert Network, preparedness guidance
• Do not treat named caverns, tunnels or wrecks as overhead-safe recreational tours. No unsupervised cave, wreck penetration or depth freediving. Yap Visitors Bureau, dive-site descriptions Yap Divers, freediving
• Keep clear of mantas and turtles. Never touch mantas, block cleaning routes, hang on live coral or chase wildlife for images. The local operator publishes a no-touch manta practice. Yap Divers, manta diving NOAA National Marine Sanctuaries, look but do not touch
• Verify each boat's current oxygen stock, radio/communications, first-aid training and emergency response chain, not merely an older marketing claim about equipment. Yap Divers, frequently asked questions Divers Alert Network, preparedness guidance

Yap State Hospital provides on-island general medical care and an emergency-room pathway: a Yap State Government hospital notice supplies telephone numbers and says urgent cases can be seen outside standard outpatient hours. It does not confirm hyperbaric chamber availability. The operator's FAQ says a Yap Hospital chamber exists, but no up-to-date independent record was found confirming that it is staffed, functioning and ready to treat a tourist dive incident. Plan as though recompression may require specialist advice and medical evacuation until qualified local authorities confirm otherwise. Australian government travel guidance lists Yap State Hospital and police contacts. For any suspected decompression illness or other dive emergency, seek local emergency care first and contact DAN's 24/7 hotline for medical/evacuation coordination; do not delay assessment because symptoms seem mild. Yap State Government, hospital outpatient notice Yap Divers, frequently asked questions Australian Smartraveller, Micronesia Divers Alert Network, emergency contact US State Department, FSM travel advisory

Yap's reef and lagoon are not open-access recreation space. The Yap Visitors Bureau identifies a manta sanctuary and explains that reef waters inside the barrier reef are traditionally owned; Yap State's constitution recognizes customary marine resource rights. A conservation designation does not remove village authority or establish a visitor's right to approach a cleaning station. Book operators who obtain permissions and brief visitors. Use buoyancy and fin awareness to protect coral, avoid unnecessary artificial lighting around mantas, take no organisms or artifacts, and follow the local operator's no-touch/no-coral-hanging code. Additional community closure, marine protected area and landing rules require confirmation for the actual date and site. Yap Visitors Bureau, Dive Yap Yap State Constitution, Article XIII Yap Divers, manta diving Yap Visitors Bureau, Do's and Don'ts