Muara and Brunei Bay

Choose an authorized guide and a site/depth plan appropriate to actual certification and recent experience. The official brochure describes wrecks ranging from easy recreational profiles to technical depths beyond 50 m. Poni says wreck penetration is restricted to specifically trained advanced divers and warns some hulls have degraded. Secure loose equipment; carry a computer and surface marker; listen for briefing on tide, visibility, traffic, emergency pickup and surface conditions. Never free-dive alone. Do not use Serasa/Muara port approaches for unsupervised swims. For suspected illness, call 991 and follow medical advice rather than driving directly to an assumed chamber.

Brunei's Ministry of Health publishes ambulance 991 and search-and-rescue 998, and lists a 24-hour emergency department at RIPAS Hospital in Bandar Seri Begawan. It does not follow that a recompression chamber is currently available there. DAN advises evaluation at the nearest suitable medical facility and clinician-directed chamber/evacuation arrangements. Ask the operator to identify its on-board oxygen, trained staff, evacuation contact, realistic boat return and treatment referral; verify dive-specific insurance before committing.

Brunei Tourism instructs divers not to touch corals, anchor on reefs, take shells or artifacts, feed wildlife or leave litter, and to secure gear so it cannot drag across organisms. The Fisheries Department describes the Fisheries Order 2009 and protected-area rules, including fishing-free zones and poaching prohibitions. Confirm whether a specific site is restricted and avoid any collection of historic wreck objects, even if apparently loose. No reliable seasonal wildlife encounter schedule was established; maintain respectful distance and follow any water-quality or harmful-algal-bloom notices.