Parvin-class patrol craft

Class overview
Builders:|  Peterson Builders, Sturgeon Bay
Operators:|  Islamic Republic of Iran Navy
In service:|  1967–present
Completed:|  3
Active:|  3
General characteristics
Type:|  Large patrol craft
Displacement:|

* 100/105 tons standard
* 146/150 tons full load

Length:|  30.5–30.8 m (100–101 ft)
Beam:|  6.5–6.7 m (21–22 ft)
Draught:|  2.5–3.1 m (8.2–10.2 ft)
Installed power:|  Diesel
Propulsion:|

* 8 × GM 6-71 engines, 2,040 horsepower (1.52 MW)
* 2 × shafts

Speed:|  15–22 kn (28–41 km/h)
Range:|

* 1,140 nmi (2,110 km) at 17 knots (31 km/h)
* 1,500 nmi (2,800 km) at 10 knots (19 km/h)

Complement:|  20

The Parvin (Persian: پروین) is a class of large patrol craft operated by the Islamic Republic of Iran Navy. They ships in the class are modified versions of PGM-71 vessels, all built by the American shipyard Peterson Builders.

## Design

Sources differ in recording characteristics of Parvin class vessels.

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 105 tonnes (103 long tons) and 146 tonnes (144 long tons).[2]

The class design is 30.8 m (101 ft) long, would have a beam of 6.5 m (21 ft) and a draft of 2.5 m (8 ft 2 in) on the report of Jane's,[1] while Conway's mentions the dimensions as 30.5 m (100 ft) × 6.7 m (22 ft) × 3.1 m (10 ft).[2]

Both sources agree that the ships are powered by eight General Motors diesel engines totaling 2,040 horsepower (1.52 MW) that rotate a pair of shafts, but the engine models are variously cited GM 8-71[2] and GM 6-71.[1] The system can reach a top speed of 15 knots (28 km/h) as stated by Conway's,[2] albeit Jane's mentions 22 knots (41 km/h).[1] The ranges given for the class are 1,140 nmi (2,110 km) at 17 knots (31 km/h)[1] and 1,500 nmi (2,800 km) at 10 knots (19 km/h).[2]

Original armament of the ships reportedly included five guns: 12.7mm and 20mm each two and one 40mm.[2] French sources give one 40mm and four 20mm machine guns, as well as a pair of Mk22 Mousetrap and DC racks.[2] As of 2015, they are reported to be armed with five guns consisting an old variant of Bofors 40 mm/60, a couple of Oerlikon GAI-BO1 20mm in addition to two 12.7 machine guns.[1] They are also equipped with four racks of depth charge (with eight US Mk 6), and two missile launchers of unknown type are installed on them after refit.[1]

The original radar was model 303 of Decca Radar,[2] while the current surface search system is known to be working on I-band.[1] The sonar is a high-frequency hull-mounted active attack SQS-17B[1][2] but is allegedly unlikely to be serviceable per Jane's.[1]

Crew on each ship of this class totals 20 officers and men.[1][2]

## Ships in the class

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

Ship  | Namesake  | Pennant number  | Commissioned  | Status

|
|
|
|

missing name (ex-PGM 103)  | Pleione | 211  | 1967  | In service
missing name (ex-PGM 112)  | Mars | 212  | 1969  | In service
missing name (ex-PGM 122)  | Venus | 213  | 1970  | In service

## References

1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 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
2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 "Iran", Conway's All the World's Fighting Ships 1947–1995, Conway Maritime Press, 1996, pp. 187, ISBN 978-1557501325

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