HTMS Hanhak Sattru 312
เรือหลวงหาญหักศัตรู 312
Twin Sister of the Suphairin
The second of two Thai Navy vessels sunk off Koh Tao in 2023, sitting shallower than its sister ship and accessible to a wider range of divers.
Depth Range
13–24m
Site Type
wreck
Koh Tao & Offshore
Visibility
8–20m
27–30°C
Getting There
15 min boat from Koh Tao
East coast of Koh Tao
Marine Life
Notable Features
- • Sunk 2023
- • Shallower than sister ship
- • Part of 3-wreck cluster
Best Time to Visit
About HTMS Hanhak Sattru 312
HTMS Hanhak Sattru 312 was sunk alongside the Suphairin 313 in 2023, giving Koh Tao a cluster of three military wrecks. This vessel sits slightly shallower with the deck at around 13m, making it more accessible for intermediate-level divers. The wreck is developing its own artificial reef ecosystem distinct from its sister ship.
Wreck Information
Vessel
HTMS Hanhak Sattru 312
Length
45m
Sunk
2023
Royal Thai Navy fast attack craft, sunk as artificial reef alongside HTMS Suphairin 313.
Tips
Can be combined with the Suphairin 313 on a single dive if air management is good.
Experience Required
Advanced Open Water recommended.
Location
GPS: 10.0820°N, 99.8320°E