The Adventure Club
Living with the Ocean
South Siam 4 is almost as flexible as South Siam 3. On South Siam 4 you can get on and off the boat 5 days a week compared to South Siam 3’s 7 days a week, but on South Siam 4 you get to go to Koh Tachai and Richelieu Rock as well as Similans and Koh Bon.
South Siam 4 dives around the Similans every day of the week except Wednesdays and Sundays when she goes up to Koh Bon, Koh Tachai and Richelieu Rock for the day.
You can basically join South Siam 4 any morning except Wednesdays and Sundays. You can also stay on South Siam 4 as long as you want, but you cannot get off the boat on a Wednesday or Sunday.

Technical Data |
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Length |
28 meters |
Width |
6.5 meters |
Facilities |
10 Twin Cabins Saloon and Sundeck |
Technic |
Engines: 2 x Hino 420 HP |
Safety |
1 MFA Kit |
Communications |
VHF Radio |
Layout |
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Day |
Destination |
Monday |
Similans |
Tuesday |
Similans |
Wednesday |
Richelieu Rock |
Thursday |
Similans |
Friday |
Similans |
Saturday |
Similans |
Sunday |
Richelieu Rock |
Please note: In order to visit Richelieu Rock you need to do a minimum of 3-days / 2-nights on South Siam 4, spanning a Wednesday or Sunday, making sure that your first and last day on the boat is not a Wednesday or Sunday.
Duration |
#of Dives |
Diver Price |
Non- Diver Price |
3 days / 2 nights |
11 dives |
18,900 baht |
15,900 baht |
4 days / 3 nights |
15 dives |
22,900 baht |
18,900 baht |
5 days / 4 nights |
19 dives |
26,900 baht |
21,900 baht |
6 days / 5 nights |
23 dives |
30,900 baht |
24,900 baht |
7 days / 6 nights |
27 dives |
34,400 baht |
27,900 baht |
The prices quoted above are per guest and includes:
Remarks: The Similan & Surin Marine National Park fees are not included.
Similans National Park Fee...
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