Alvand-class frigate

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Alborz (72) and Sabalan (73) sailing together
Class overview
Name	Alvand / Saam class
Builders	Vosper Thornycroft, Vickers
Operators	Imperial Iranian Navy  Islamic Republic of Iran Navy
Succeeded by	Moudge class
Built	1968–1972
In service	1971–present
Completed	4
Active	3
Lost	1
General characteristics
Type	Frigate
Displacement	1,100 tons (1,540 tons full load)
Length	94.5 m (310 ft)
Beam	11.07 m (36.3 ft)
Draught	3.25 m (10.7 ft)
Propulsion	2 Paxman Ventura cruising diesels 3,800 bhp (2,800 kW), and 2 Rolls-Royce Olympus TM2 boost gas turbines 46,000 shp (34,000 kW) on 2 shafts
Speed	17 knots (31 km/h) on diesels; 39 knots (72 km/h) on gas turbines
Range	5,000 nmi (9,000 km) at 15 knots (28 km/h)
Complement	125-146
Armament	4 × C-802 anti-ship missiles 1 × 4.5 in (114 mm) Mark 8 gun 1 × twin 35 mm (1.4 in) AA guns 2 × single 20 mm (0.79 in) guns 2 × 81 mm (3 in) mortars 2 × 0.50 cal machine guns 1 × Limbo ASW mortar 2 × triple 12.75 in (324 mm) torpedo tubes

The Alvand class (Persian: کلاس الوند) or Saam class (Persian: کلاس سام) was originally a class of four frigates built for the Imperial Iranian Navy. They were renamed after the Iranian Revolution, and served in the Islamic Republic of Iran Navy during Iran-Iraq War. Three still remain in service. A fourth was sunk by the U.S. Navy in 1988.