Dennis Bakhuis

Dive site · sea · Phi Phi, Koh Haa and the southern Andaman pinnacles

🇹🇭 Hin Muang (Purple Rock)

Koh Lanta, Krabi, Thailand

Five hundred metres from Hin Daeng, never breaks the surface, covered in purple soft coral, and carrying the deepest wall in Thailand.

Dives here
1
Deepest
24.7 m
Water
salt
First · last
2013
Also known as
Hin Muang / Purple Rock

Revision 1 · changed 10 Oct 2026

History
  1. r1 10 Oct 2026 Imported from the personal log · Dennis Bakhuis

Site data © divelog-sites contributors (ODbL), descriptions and maps CC BY-SA 4.0 · 53edcaf

1 map

↓30 m↓40 m↓60 mShallowest pinnacle↓8 mPinnacle↓14 mPinnacle↓16 mPinnacle↓12 mPinnacle↓14 mPinnacle↓16 mPinnacle↓22 mSaddle↓26 mPinnacle↓22 mPinnacle↓16 mChannel between the rocks↓20 mMooringMooringSouth wall, drops past 60 mN10 m
  • Buoy
  • Point of interest
  • Marker
  • Pinnacle / rock
  • Depth contour
  • Wall / drop-off
  • Coral / reef
  • Depth
Site map · 11 objects · max 60 m

Hin Muang (Purple Rock), a completely submerged ridge about 200 m by 25 m (Phuket Dive Guide) with its top at 6-8 m, three main pinnacles and several smaller ones, and walls dropping past 60 m on the south side; the whole ridge is a manta cleaning station and the currents sweep along both sides. The site coordinates (an OSM reef node at 7.3674, 98.8700) sit 24 km north-east of the real site; the origin here is placed 630 m west of Hin Daeng (the OSM offset between the two reef nodes, applied to the Hin Daeng dive-site node at 7.1490, 98.8236). Positions are approximate.

Map © divelog-sites contributors, CC BY-SA 4.0 · 53edcaf

Hin Muang — purple rock — is 500 m from Hin Daeng and is the more impressive of the two. It never reaches the surface: the top of the ridge is about 8 m down, which is why it stayed unknown until the 1980s despite being next to a site people had been diving for years.

The ridge runs about 200 m and its walls drop past 70 m, the deepest in Thailand. The name comes from the dense cover of purple soft coral on the rock. Same cast as Hin Daeng — mantas, whale sharks, grey reefs, big schooling fish — and the same hard current.

Dived 28 November 2013 to 24.7 m, immediately before Hin Daeng.

Dived here with

Floris Kim

Nearby sites

1 dive at Hin Muang (Purple Rock)

  1. 28 Nov 2013 with Floris, Kim boat date28 Nov 2013 depth24.7 m time45 min water—

Sources

  • First-hand observation (Dennis Bakhuis)