HMS Suddhadib - Koh Tao

The HMS Suddhadib, or HTMS Sattakut as it’s often called, is one of those wrecks that just has *character*. Sunk deliberately in 2011 to create an artificial reef, it’s a former WWII patrol boat, sitting upright in about 30 metres of water. We love the way she’s already been completely claimed by the ocean, covered in whip corals and sponges, with big schools of yellow-tail barracuda circling the mast. Entering the wheelhouse at 18 metres is our favourite part; light streams through the windows, illuminating glassy sweepers and cardinalfish darting between the decaying consoles. Further down, the deck guns at the bow and stern are impressive, often with a giant trevally or two lurking nearby. We usually aim for an early morning dive here to beat the crowds, or a late afternoon one when the light softens. It’s a great dive for advanced open water divers looking for a bit more depth and the thrill of exploring penetration points, though even a loop around the exterior offers plenty to see. Just watch for stronger currents that can sometimes sweep across the bow.

Location
Koh Tao, Thailand, Southeast Asia
Coordinates
12.533110, 100.956310
Type
wreck

Marine Protected Area: Chonburi Environmental Protected Area

Best Time to Dive in Koh Tao

The warmest water temperatures in Koh Tao occur in May, averaging 30.6°C. The coolest conditions are in January at 28.3°C.

Monthly Water Temperatures

  • January: 28.3°C
  • February: 28.6°C
  • March: 29.3°C
  • April: 30.2°C
  • May: 30.6°C
  • June: 30.2°C
  • July: 30.0°C
  • August: 29.7°C
  • September: 29.4°C
  • October: 29.2°C
  • November: 29.3°C
  • December: 28.6°C

Nearby Dive Sites in Koh Tao

Nearest Dive Centres to HMS Suddhadib

Marine Life in Koh Tao

Home to 56 recorded species including 35 reef fish, 11 sharks & rays, 4 other, 2 hard corals, 1 clams & mussels, 1 sea urchins.

Notable Species

Recommended Packing List for HMS Suddhadib

Based on average water temperature of 29.5°C, currents 14 cm/s.

  • Shorty or Rashguard - warm 29°C water needs minimal exposure protection
  • Mask - essential for every dive
  • Fins
  • BCD - buoyancy compensator
  • Regulator - your most safety-critical piece of gear
  • Dive Computer - tracks depth, time, and NDL
  • Surface Marker Buoy (SMB) - essential for boat pickups
  • Dive Torch - useful for crevices and colour at depth
  • Underwater Camera - capture your diving memories