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.)
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.
SS-2 (I) 20NM surface/low-alt air search (range, bearing)
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/LRN-15C LORAN system, Type SCR-642-A VHF comms mast, rescue buoy