Kaivan-class patrol craft

Class overview
Builders	USCG, Curtis Bay
Operators	Islamic Republic of Iran Navy
In service	1956–present
Completed	4
Active	3
Lost	1
General characteristics
Type	Large patrol craft
Displacement	98/100 tons standard; 148/150 tons full load;
Length	28.9 m (94 ft 10 in)
Beam	6.2 m (20 ft 4 in)
Draught	1.8–2 m (5.9–6.6 ft)
Installed power	Diesel
Propulsion	2 or 4 × NYHMS-1200 engines, 2,120 horsepower (1.58 MW); 2 × shafts;
Speed	15–21 kn (28–39 km/h)
Range	2,324 nmi (4,304 km) at 8 knots (15 km/h); 1,500 nmi (2,800 km) at 15 knots (28 km/h);
Complement	15

The Kaivan (Persian: کیوان) is a class of large patrol craft operated by the Islamic Republic of Iran Navy. They ships in the class are modified versions of the American Cape-class vessels, built by the United States Coast Guard Yard in the 1950s.

Design

Sources cite displacement of Kaivan class vessels slightly different. According to Jane's Fighting Ships, the ships have a standard displacement of 100 tonnes (98 long tons) and 150 t (150 long tons) at full load.^[1] Conway's All the World's Fighting Ships puts the numbers at 98 tonnes (96 long tons) and 148 tonnes (146 long tons) for standard and full load displacements respectively.^[2] Combat Fleets of the World mentions only 85 tonnes (84 long tons).^[3] The class design is 28.9 m (95 ft) long, would have a beam of 6.2 m (20 ft) and a draft of 2 m (6 ft 7 in).^[1]^[2] The length is also recorded 29 m (95 ft).^[3]

Ships in the class

The ships in the class are:^[1]^[2]

Ship	Pennant number	Commissioned	Status
IRIS Kaivan	201 (ex-61)	14 January 1956	In active service
IRIS Tiran	202 (ex-62)	1957	In active service
IRIS Mehran	203 (ex-63)	1959	Sunk in 1980 or 1981
IRIS Mahan	204 (ex-64)	1959	In active service

References

1 2 3 Saunders, Stephen; Philpott, Tom, eds. (2015), "Iran", IHS Jane's Fighting Ships 2015–2016, Jane's Fighting Ships (116th Revised ed.), Coulsdon: IHS Jane's, p. 389, ISBN 9780710631435, OCLC 919022075
1 2 3 Gardiner, Robert; Chumbley, Stephen; Budzbon, Przemysaw, eds. (1996), "Iran", Conway's All the World's Fighting Ships 1947–1995, Conway Maritime Press, p. 187, ISBN 978-1557501325
1 2 Couhat, Jean Labayle, ed. (1986), Combat Fleets of the World 1986/87: Their Ships, Aircraft, and Armament, Annapolis, Maryland: Naval Institute Press, p. 255, ISBN 0-85368-860-5

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[J2015-1] 1 2 3 Saunders, Stephen; Philpott, Tom, eds. (2015), "Iran", IHS Jane's Fighting Ships 2015–2016, Jane's Fighting Ships (116th Revised ed.), Coulsdon: IHS Jane's, p. 389, ISBN 9780710631435, OCLC 919022075

[Conway's-2] 1 2 3 Gardiner, Robert; Chumbley, Stephen; Budzbon, Przemysaw, eds. (1996), "Iran", Conway's All the World's Fighting Ships 1947–1995, Conway Maritime Press, p. 187, ISBN 978-1557501325

[Combat_Fleets-3] 1 2 Couhat, Jean Labayle, ed. (1986), Combat Fleets of the World 1986/87: Their Ships, Aircraft, and Armament, Annapolis, Maryland: Naval Institute Press, p. 255, ISBN 0-85368-860-5

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