Bangrachan class : Minelayer
HTMS Nhong Sarhai built by Cantieri Riuniti dell'Adriatico, Italy, launch 1936, delivery to siam 26 May 1937, and commission 05 Oct 1938.
Displacement 395 tons full load, Length 49.12 m, Beam 7.91 m, Propulsion diesel, Speedmax 13 knots. Total cost of 2 minelayer program = 23,300 US (excluded all weapons)
During the Franco-Thai War (1940-1941), HTMS Nhong Sarhai was armed with 2x76/40 QF Mk I HA Naval Guns and 2xMadsen 20 mm machine guns. She was one of six RTN vessels in The Battle of Koh Chang (14 January 1941)
The ship mid-life upgrade by replace aft 76/40 un by Bofors 40/60 machine gun and replace 2xMadsen 20 mm machine guns by 2xOerlikon 20mm machine guns, may be built radio room and add navigation radar but i don't had a photo. HTMS Nhong Sarhai and her sister ship HTMS Bangrachan were decommissioned in 08 July 1980.