
Similan Islands · Thailand · Wreck · Reef
Beacon Beach
The 27 m liveaboard Atlantis X, bow at 16 m
Area photo: Reinhard Link · CC BY-SA 2.0
Beacon Beach, also listed as Beacon Bay, is a sloping reef in the Similans with the wreck of the Atlantis X on it, a 27 m Similan liveaboard that sank in 2002. The bow sits at 16 m and the hull runs down to the stern at 30 m, so the whole wreck stays inside recreational limits. Current is none to light, and the site is also used for night dives.
Also known as Beacon Bay.
Where it is and how deep
8.6476° N, 97.6506° EApproximate position — the dashed circle shows where the site lies; your operator's briefing has the mooring.
The dive
The reef here is a slope and the Atlantis X lies along it, bow uppermost. You can take the wreck as a shallow pass over the bow at 16 m or work it from the stern at 30 m upwards, depending on how the profile is planned, and with no more than a light current neither approach is forced on the group. The hull is swum from the outside, so no wreck training is called for.
It makes an easy first wreck: the depths stay inside normal recreational limits and the reef around the hull gives somewhere to spend the rest of the dive, with the neighbouring Beacon reef often combined into the same outing. Batfish and blue-spotted stingrays are the regulars on and around the wreck, and a sea snake, an octopus or lobsters turn up in the shallows. The site is popular after dark as well.
The wreck
- Vessel
- Atlantis X
- Type
- Similan liveaboard dive boat
- Length
- 27 m (89 ft)
- Sunk
- 2002
- Cause
- Not published; no account of how she sank has appeared in the dive literature
- Lies
- On the reef slope, bow at 16 m and stern at 30 m
Marine life and season
- Stingrays
- Sea snakes
- Octopus & cuttlefish
- Macro critters
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Prime | Prime | Prime | Prime | Fair | Off-season | Off-season | Off-season | Off-season | Fair | Good | Prime |
Season follows Similan Islands: The park is closed by law from mid-May to mid-October; December to April is the calm high season.
Sources
- Beacon Beach — Divezone
- Beacon Bay — Scubago
More dive sites in Similan Islands
Drift
Strong-current ridge with soft coral gardens and big boulders
Violet and blue corals on the site's main bommie
Pinnacle
Granite tunnels and arches between islands 6 and 7
Reef
Longest reef in the Similans, over 300 coral species
Reef
Hard-coral slope of staghorn, table and brain corals
Reef
Canyons between the rocks, gorgonians below 20 m
Reef
Shallow bay under the duck-shaped rock, with no current
Reef
Huge schools of snapper over large hard-coral tables
Similar dives elsewhere
Small wrecks and concrete cubes in one calm bay, with batfish in the hulls
Upright navy wreck, superstructure at 18 m, keel at 30 m
A Cessna wing at nearly 30 m, colonised as a miniature reef
A freighter on her side at 30 metres, reached from the road



