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SS GUPPY-IIA (Turkey) class 


GUPPY IIA (Turkey) class SS

(United States / Turkey)

Name

No.

Comm.

Recom.

Decom.

Fate

TCG Orucreis (ex-USS Pomfret)

S-337 (ex-SS-391)

19 Feb 1944

3 May 1972

15 Sep 1986

Scrapped 1988

TCG Ulucalireis (ex-USS Thornback)

S-338 (ex-SS-418)

13 Oct 1944

3 May 1972

31 July 2000

Museum ship (Istanbul, Turkey)

TCG Burakreis (ex-USS Sea Fox)

S-335 (ex-SS-402)

14 June 1944

8 Aug 1971

1 July 1996

Scrapped 1999

TCG Muratreis (ex-USS Razorback)

S-336 (ex-SS-394)

3 Apr 1944

17 Dec 1971

15 Mar 2002

Museum ship (Little Rock, AR)

TCG Inonu (ex-USS Threadfin)

S-346 (ex-SS-410)

30 Aug 1944

24 Aug 1972

11 Aug 1998

Scrapped 1999

TCG Preveze (ex-USS Entemedor)

S-345 (ex-SS-340)

6 Apr 1945

24 Oct 1972

20 Mar 1986

Scrapped

1996

TCG Cerbe (ex-USS Trutta)

S-340 (ex-SS-421)

16 Nov 1944

27 May 1973

23 July 1999

Scrapped 2001

Notes: The GUPPY IIA conversions of WWII-era USN diesel subs involved deleting one engine and replacing it with mechanical gear and air conditioning; deleting all guns and streamlining the outer hull, standardizing the electric system to 120vAC, and modernizing the sensor fit.

Despite their obsolescence the Turkish navy kept these subs in service until nearly the turn of the millennium. They may still have proved useful in shallow-water areas like the Bosporus or Sea Of Marma, where attacks would have been at very close range in confined waters. Over the years Turkey became adapt at manufacturing spare parts as the USN’s stockpile depleted.

The city of Little Rock, Arkansas purchased the decommissioned Muratreis (ex-USS Razorback) as the razorback hog is their state’s mascot. The Turkish navy was extremely cooperative in the project; selling the sub for the token price of $30,000 (far less than even the scrap metal value) and assisted it it’s departure back to the United States.

Displacement: 1825t surfaced, 2424t submerged Dimensions: 311’9”x27’3”x16’10” Machinery: Diesel-electric: 4 Fairbanks-Morse 1938-1/8DAS diesels, 4 Elliot 2740hp electric motors, 2 126-cell lead-acid Sargo-II batteries, 2 shafts w/4-bladed non-CP props Max speed: 17kts surfaced, 14kts submerged, 9kts snorkeling Submerged endurance: 45mins @ full speed; 48hrs @ 2kts Range: 11,000NM @ 10kts surfaced, 75 days provisions Diving depth: 412’ test depth Complement: 66 (6 officers, 60 enlisted)

(Top: The SS-2 radar operator’s PPI console on TCG Ulucalireis. Bottom: The analog torpedo firing solution computer on TCG Ulacalireis.)

 

WEAPONS-Torpedoes

x10 (6 fwd, 4 aft) 21” tubes for Mk14, Mk18, Mk23, Mk27, and Mk37 torpedoes. Twenty-four torpedoes total. Two mines could also be carried for every torpedo omitted.

SENSORS-Radar

SS-2 (I)                                            20NM surface/low-alt air search (range, bearing)

SENSORS-EW

AN/BLR-1 ESM

AN/FLR-2 ESM

SENSORS-Sonar

AN/BQS-2                                        9NM active (range, bearing, depth)

AN/BQR-3A                                    12NM passive (bearing,class)

AN/BQR-4                                       20NM passive (port/starboard indicator only)

AN/UQC-1 u/w comms

AN/UQN-1 fathometer

Misc.

AN/LRN-15C LORAN system, Type SCR-642-A VHF comms mast, rescue buoy

 

Entry created by: Jason W. Henson
Contributors:

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