Tir-class speedboat

The Tir II (IPS 18) is an Iranian built small fast attack craft torpedo boat featuring a low, flush hull to reduce its radar cross-section. The radar is set on a retractable mast, with fixed 21" tubes inside the superstructure. Engines exhaust at the waterline to reduce its IR signature. Built by Iranian Maritime Industries (a subsidiary of the state-owned DIO company), the Bavar-class missile-armed boats are being acquired to replace the Tir-IIs.[1]

Class overview
Name	Tir II (IPS 18)
Operators	Iran  Syria
General characteristics
Type	Torpedo Boat
Displacement	26t standard, 28 ¼ t full
Length	69’4”x18’10”x6’9”
Beam	18’10”
Height	6’9”
Installed power	3 1200hp diesels (type unknown), 3 DIO waterjets
Propulsion	2 shafts
Speed	52 kn
Range	450 nmi (830 km) @ 25 knots
Complement	6
Sensors and processing systems	I-band navigation radar
Armament	x4 (2 twin mounts) 12.7 mm x2 21 inch torpedo tubes (compatible with either Chinese, North Korean, or Iranian torpedoes) x1 Dooshka 12.7 mm MG

Ten units are in service, believed to be manned by the IRGCN, not the regular Iranian navy. In late 2006/early 2007 six of the sixteen vessels built were transferred to the Syrian Navy, and remain fully operational.