HTMS Sattakut

The HTMS Sattakut began its service life as a US Navy minesweeper before being transferred to the Royal Thai Navy, where it served for decades before being decommissioned and sunk to create an artificial reef. Smaller than the Suphairin, the Sattakut is more compact and easier to fully explore within a single dive, making it a popular choice for divers wanting a complete wreck experience without multiple visits.

The wreck rests at a depth accessible to Advanced Open Water divers, sitting upright with clear structure that makes for intuitive navigation. The deck, bridge, and gun mounts are all recognisable, giving the dive a strong sense of exploring an actual naval vessel rather than just an artificial structure.

Like its sister ship, the Sattakut has become a thriving artificial reef. Soft corals have begun establishing themselves on the superstructure, and the wreck attracts both resident reef fish and the occasional larger pelagic species passing through. The combination of historical interest and marine life makes it a dive that appeals to both wreck enthusiasts and general reef divers.

Visibility and current conditions at the Sattakut can vary more than at Koh Tao’s sheltered reef sites, so it’s typically dived as a guided trip with attention paid to conditions on the day.