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A starboard view of the Iranian destroyer escort IIS Saam (DE-71), redesignated IRS Alvand (F-71)
|Builders:||Vosper Thornycroft, Vickers,
|Succeeded by:||Moudge-class frigate|
|Displacement:||1,100 tons (1,540 tons full load)|
|Length:||94.5 m (310 ft)|
|Beam:||11.07 m (36.3 ft)|
|Draft:||3.25 m (10.7 ft)|
|Propulsion:||2 Paxman Ventura cruising diesels 3,800 bhp, and 2 Rolls Royce Olympus TM-3A boost gas turbines 46,000 shp (34,000 kW) on 2 shafts|
|Speed:||17 knots (31 km/h) on diesels39 knots (72 km/h) on gas turbines|
|Range:||5,000 nmi (9,000 km) at 15 knots (28 km/h)|
|Armament:||4 × C-802 anti-ship missiles
1 × 4.5 inch (114 mm) Mark 8 gun
1 × twin 35 mm AAA, 2 × single 20 mm AAA
2 × 81 mm mortars
2 × 0.50cal machine guns
1 × Limbo ASW mortar
2 × triple 12.75 in torpedo tubes
The Alvand class was originally a class of four frigates known as the Saam Class built for the pre-revolutionary Iranian Navy. They were renamed the Alvand Class after the revolution.
Three remain in service since the fourth was sunk by the US Navy in 1988 during the Iran-Iraq War.
Development & Building
- ASuW - 1 × quintiple Sea Killer Mk2 surface to surface missile
- AAW - 1 × triple Sea Cat surface to air missile launcher
- ASW 1 × 3 barrelled Anti Submarine Mortar Mark 10 Limbo launcher
- Guns - 1 × Mark 8 Mod 0 4.5 inch general purpose & 1 × twin 35mm Oerlikon AA
- Electronics - Plessey AWS 1 air surveillance radar with on-mounted IFF; 2 × Contravenes Seahunter systems (For use with Sea cat, Sea Killer & the 35mm mount); Decca RDL 1 passive direction finding equipment
They saw action during the "Tanker War" phase of the Iran–Iraq War and proved effective against Iraqi forces. However after one was sunk, and other significant losses taken, during Operation Praying Mantis they saw little further use as the Iranian Navy proved no match for the US Navy.
The Sea Killer missiles were replaced by Chinese made C-802s in the 1990s, and the Sea Cats replaced by the addition of a 20mm AA gun leaving remaining ships with practically no effective anti-aircraft ability.
2 × triple 12.75 in torpedo tubes, 2 × 81 mm mortars & 2 × 0.50 cal machine guns were also fitted.
Ships in the class
|Alvand - ex-Saam||71 (ex- DE 12)||Vosper Thornycroft||1968||In Service|
|Alborz - ex-Zaal||72 (ex DE 14)||Vickers||1969||In Service|
|Sabalan- ex-Rostam||73 (ex DE 16)||Vickers||1969||In Service|
|Sahand - ex-Faramarz||74 (ex DE 18)||Vosper Thornycroft||1969||sunk on April 18, 1988.|