Tir-class speedboat
{{Short description|Iranian torpedo boat}}
{{Refimprove|date=January 2017}}
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{{Infobox ship image |Ship image=IPS-18 speedboats.jpg}} {{Infobox ship class overview |Name=Tir II (IPS 18) |Operators=
}} {{Infobox ship characteristics |Ship type=Torpedo Boat |Ship tonnage= |Ship displacement=26t standard, 28 ¼ t full |Ship tons burthen= |Ship length={{cvt|69|ft|4|in}} x {{cvt|18|ft|10|in}} x {{cvt|6|ft|9|in}} |Ship beam={{cvt|18|ft|10|in}} |Ship height={{cvt|6|ft|9|in}} |Ship draught= |Ship draft= |Ship depth= |Ship hold depth= |Ship decks= |Ship deck clearance= |Ship ramps= |Ship ice class= |Ship power=3 1200hp diesels (type unknown), 3 DIO waterjets |Ship propulsion= 2 shafts |Ship sail plan= |Ship speed=52 kn |Ship range={{convert|450|nmi|km|abbr=on}} @ 25 knots |Ship endurance= |Ship test depth= |Ship boats= |Ship capacity= |Ship troops= |Ship complement=6 |Ship crew= |Ship time to activate= |Ship sensors=I-band navigation radar |Ship EW= |Ship armament=
|Ship armour= |Ship armor= |Ship aircraft= |Ship aircraft facilities= |Ship notes= }} |
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.{{cite web|url=http://www.harpoondatabases.com/Encyclopedia/Entry2614.aspx |accessdate=August 18, 2014 |url-status=dead |archiveurl=https://web.archive.org/web/20120511033243/http://www.harpoondatabases.com/encyclopedia/Entry2614.aspx |archivedate=May 11, 2012|title=Harpoon Database}}
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.