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USS Grunion (SS-216) Conventionally-Powered Attack Submarine


The final resting place of USS Grunion remained a mystery until recent events unfolded showing the exact location of the submarine.

 Updated: 6/30/2017; Authored By Staff Writer; Content ¬©www.MilitaryFactory.com


The USS Grunion (SS 216) is best known for her mysterious dissappearance. Until recently, little was known of the last whereabouts of the vessel and her 70 crew members. It was known that she had been attacked after experiencing extensive anti-submarine activity off Kiska near the Aleutian Islands but besides her last radio transmission, she was never heard from again - reported lost on August 16, 1942.

The USS Grunion was a Gato-class submarine - one of 77 such submarines produced by the United States of America during World War 2. She sailed away from New London after her shakedown voyage and participated in the rescue of some 16 American sailors in the Caribbean Sea - victims of a German U-boat attack. She would later traverse through Panama and arrive at Pearl Harbor on June 20th before being sent to the Aleutian Islands for combat patrols of enemy shipping.

Grunion operated in these seas throughout the month of July until on July 30th, a transmission was received from her about the high level of anti-submarine activity that was developing. To avoid her falling fate to enemy action, the vessel was ordered back to the relative safety of Dutch Harbor. It is at this time that the Grunion was never heard from again. Rescue searches ensued to no avail.


USS Grunion (SS-216) Technical Specifications



Service Year: 1942
Type: Conventionally-Powered Attack Submarine
National Origin: United States
Ship Class: Gato-class




Structural (Crew Space, Dimensions and Weights)



Complement (Crew): 70
Length: 311.9 feet (95.07 meters)
Beam (Width): 27.3 feet (8.32 meters)
Draught (Height): 17 feet (5.18 meters)

Surface Displacement: 1,525 tons

Installed Power and Base Performance



Engine(s): 4 x General Motors Model 16-248 V16 diesel engines with electrical generators; 2 x 126-cell Sargo-type batteries; 4 x General Electric electric motors; 2 x propellers.

Surface Speed: 21 knots (24 mph)
Submerged Speed: 9 knots (10 mph)
Operational Range: 10,999 nautical miles (12,658 miles, 20,371 km)

Armament / Air Wing



10 x 533mm (21") torpedo tubes (6 forward-facing, 4 rear-facing) with 24 torpedoes.
1 x 76mm (3") deck gun
4 x 12.7mm anti-aircraft machine guns

Aircraft: None.

Global Operators



United States

Ships-in-Class (77)



USS Gato (SS 212); USS Greenling (SS 213); USS Grouper (SS 214); USS Growler (SS 215); USS Grunion (SS 216); USS Guardfish (SS 217); USS Albacore (SS 218); USS Amberjack (SS 219); USS Barb (SS 220); USS Blackfish (SS 221); USS Bluefish (SS 222); USS Bonefish (SS 223); USS Cod (SS 224); USS Cero (SS 225); USS Corvina (SS 226); USS Darter (SS 227); USS Drum (SS 228); USS Flying Fish (SS 229); USS Finback (SS 230); USS Haddock (SS 231); USS Halibut (SS 232); USS Herring (SS 233); USS Kingfish (SS 234); USS Shad (SS 235); USS Silversides (SS 236); USS Trigger (SS 237); USS Wahoo (SS 238); USS Whale (SS 239); USS Angler (SS 240); USS Bashaw (SS 241); USS Bluegill (SS 242); USS Bream (SS 243); USS Cavalla (SS 244); USS Cobia (SS 245); USS Croaker (SS 246); USS Dace (SS 247); USS Dorado (SS 248); USS Flasher (SS 249); USS Flier (SS 250); USS Flounder (SS 251); USS Gabilan (SS 252); USS Gunnel (SS 253); USS Gurnard (SS 254); USS Haddo (SS 255); USS Hake (SS 256); USS Harder (SS 257); USS Hoe (SS 258); USS Jack (SS 259); USS Lapon (SS 260); USS Mingo (SS 261); USS Muskallunge (SS 262); USS Paddle (SS 263); USS Pargo (SS 264); USS Peto (SS 265); USS Pogy (SS 266); USS Pompon (SS 267); USS Puffer (SS 268); USS Rasher (SS 269); USS Raton (SS 270); USS Ray (SS 271); USS Redfin (SS 272); USS Robalo (SS 273); USS Rock (SS 274); USS Runner (SS 275); USS Sawfish (SS 276); USS Scamp (SS 277); USS Scorpion (SS 278); USS Snook (SS 279); USS Steelhead (SS 280); USS Sunfish (SS 281); USS Tunny (SS 282); USS Tinosa (SS 283); USS Tullibee (SS 284); USS Golet (SS 361); USS Guavina (SS 362); USS Guitarro (SS 363); USS Hammerhead (SS 364)

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