Thai Sampan.
The seagoing sampan of the Gulf of Siam has been replaced by motorized craft. The original small vessel (ca 9m on the waterline) stepped two masts that set battened lugsails.
In Bangkok, the small sampans (as shown on stamp) are used as markets boats, selling merchandise to the boat population of the city.
The larger boats set a boomed, rectangular, standing lugsail; the smaller are only paddled. Narrow square bow, rising sheer to the square stern; washboards increase the low freeboard. Reported lengths 3 – 6 meter.
Thai Junk.
A Gulf of Siam trader used before in Malaysia Peninsular and Thailand.
It is a Chinese junk built along the Gulf of Siam coast and the east coast of the Malay Peninsula.
Trade throughout the area; only a few left by the late 1960s.
High raked, sharp bow, sharp stern, nearly plump; straight keel. Raised poop; rectangular, balustraded platform extended beyond the stern, often with a mat hut for the helmsman.
Gunwale as high as 61cm. Projecting crossbeam fitted at bow, over which the anchor rope ran. Rudder shipped in sockets and raised and lowered by a tackle. Decked forward; main living quarters provided by a mat house just abaft the mainmast, some carried a small boat.
Generally painted black with a red gunwale.
Mostly two masted; foremast stepped in the bow.; mainmast just forward of amidships, raking slightly aft. Set battened lugsails; some sails lashed separately to one or more of the battens.
One some (as seen on stamp) a mizzen was stepped on the poop.
Crew of 4-5. reported lengths 9 – 25 meter; e.g. length 20 meter, beam 5 meter, draft 1.8m.
KRACHHAENG boat.
Not any info on the boat.
Packet Boat.
Not any info on the type, most probably a small ferry used on the canals and rivers in Thailand.
Thailand 2004 3Bath. Sg?, scott?
Source: Aak to Zumbra, a dictionary of the world's watercraft.