Samaesan Hole
Technical depth only: a sandy-bottomed depression between Koh Rong Nang and Koh Samaesan, about 85–100 m deep and the deepest recorded dive site in the Gulf of Thailand. It lies in an area marked on charts as an explosives dumping ground, under a commercial shipping lane, with strong tidal currents, poor visibility and no natural light below about 50 m. The first recorded descent to the bottom was in 1998.
Facts
- Region: Thailand – Pattaya & Koh Chang
- Area: Samae San & Sattahip
- Depth: 85–100 m
- Level: advanced
- Current: strong
- Coordinates: 12.538567, 100.960267
- Highlights: technical diving
- Tips: Not for recreational divers: hypoxic trimix, slack-tide planning and strong surface support are required; do not touch ordnance.