Matchanu-class submarine

	HTMS Matchanu
Class overview
Builders	Mitsubishi Heavy Industries
Operators	Royal Thai Navy
Built	1936–38
In commission	19 July 1938 – 30 November 1951
Completed	4
Scrapped	4
General characteristics
Type	Submarine
Displacement	374.5 t (368.6 long tons; 412.8 short tons) (surfaced); 430 t (420 long tons; 470 short tons) (submerged);
Length	51.00 m (167.32 ft)
Beam	4.10 m (13.5 ft)
Draught	3.60 m (11.8 ft)
Propulsion	2 × 8-cylinder 1,100 hp (820 kW) diesel engines; 1 × 540 hp (400 kW) electric motor;
Speed	14.5 kn (26.9 km/h; 16.7 mph) (maximum); 10 kn (19 km/h; 12 mph) (economical);
Range	4,770 nmi (8,830 km; 5,490 mi)
Test depth	60 m (200 ft)
Complement	5 officers & 28 crew
Armament	1 × 76/25-mm gun; 1 × 8-mm gun; 4 × 450-mm torpedo tubes;

The Matchanu class comprised the only four submarines ever employed by the Royal Thai Navy. They were built in Japan by Mitsubishi, and were in commission from 1938 throughout the Franco-Thai war and World War II. The boats were decommissioned following the Manhattan Rebellion in 1951 and the subsequent dissolution of the navy's Submarine Group.

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