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USS Canopus (AS 9)

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Name  USS Canopus
Acquired  22 November 1921
Launched  1919
Namesake  Canopus
Commissioned  24 January 1922
Length  114 m
USS Canopus (AS-9) httpsuploadwikimediaorgwikipediacommonsthu
Honors and awards  1 battle star (World War II)
Fate  Scuttled, 10 April 1942
Builder  New York Shipbuilding Corporation

Uss canopus as 9

USS Canopus (AS-9) was a submarine tender in the United States Navy, named for the star Canopus.


Canopus was launched in 1919 by New York Shipbuilding Company, Camden, New Jersey, as the passenger liner SS Santa Leonora for W. R. Grace and Company, but taken over by the Navy upon completion in July 1919 and placed in commission at that time as USS Santa Leonora. She was briefly employed as a trans-Atlantic troop transport before being decommissioned and transferred to the U.S. Army in September 1919.

The ship was reacquired by the Navy from the Shipping Board on 22 November 1921. The ship was converted to a submarine tender, and commissioned at Boston on 24 January 1922, Commander A. S. Wadsworth in command.


Canopus reported to Submarine Force, Atlantic Fleet, and remained at Boston until 9 November 1922, when she sailed for further fitting out at Coco Solo, Canal Zone, and San Pedro, California, her base as tender to the submarines of Division 9 until 17 July 1923.

Sailing to Pearl Harbor, Canopus tended Submarine Division 17 of the Battle Force with whom she sailed for permanent duty with the Asiatic Fleet in September 1924. Canopus with her squadron of submarines arrived in the Philippines on 4 November 1924. Canopus began her regular schedule of services in Manila Bay, and each summer based with the fleet at Tsingtao, China, with occasional training cruises to various Chinese and Japanese ports, and to the British and French colonies. Between 1927 and 1931, the tender was flagship of submarine divisions, Asiatic Fleet, and later was attached to Submarine Division 10, and was flagship of Submarine Squadron 5.

Canopus deployed to China three times in 1937, 1938 and 1939 respectively.

World War II, 1941–1942

On 7 December 1941, Canopus, aging but able, lay at Cavite Navy Yard, as tender to Submarine Squadron 20. In the days that followed, her men worked day and night to repair ships damaged in the daily air raids as well as to keep her brood of submarines at sea. With the Army falling back on Manila, Canopus sailed to Mariveles Bay at the tip of Bataan on Christmas Day. On 29 December 1941 she received her first direct bomb hit. A 500-pound armor-piercing bomb penetrated all decks and exploded on the propeller shaft housing. Six sailors were killed mostly from scalding and fires started in the engine rooms and magazines. The six men were buried at sea at 1735 hours in Mariveles Bay at the tip of Bataan. On 1 January 1942 she received a second direct bomb hit. This time a fragmentation bomb which exploded near the top of the towering smokestack resulting in substantial damage to the ship and injuries to 16 men of the gun crews.

Disguised as a bombed out, listing, abandoned hulk, smoke pots were placed around the ship and giving the appearance of an abandoned hulk by day, while the ship hummed with activity by night. Her crew worked at a fevered pace repairing the smaller ships also left behind and keeping the submarines in action.

Just before the New Year, the last of the submarines left Canopus, but she never quit as she cared for small craft and equipment of the Army and Navy, sent her men into battle in the improvised naval battalion which fought on Bataan, and converted her own launches into miniature gunboats dubbed Mickey Mouse Battleships which attacked the Japanese moving south near the shore. But the overwhelming Japanese strength could not be held off forever, and upon the surrender of Bataan on the night of 8–9 April 1942, Canopus was ordered scuttled in Mariveles Bay, Bataan, to deny her use to the enemy. On 9 April, she was backed off into deep water under her own power and the veteran whom the Japanese could not sink ended a lifetime of service to the Navy when she was laid to rest by her own men.

221 of her crewmen were evacuated to Corregidor on 28 February 1942 and served with the Marines 1st, 2nd, and 3rd Battalions on beach defenses. The final 327 crewmen were also evacuated to Corregidor and served in the 4th Marine Regiment's 4th Battalion Reserves (Provisional) which fought gallantly during the final battle for the island fortress. Nearly all Canopus crewmen were captured at the fall of Corregidor and spent the rest of the war in Japanese POW Camps in the Philippines and the Asian mainland. Some of the captured crew did not survive, but were killed on 14 December 1944 in the Palawan massacre.

212 were killed/missing in Action.


  • Combat Action Ribbon
  • Yangtze Service Medal
  • China Service Medal
  • American Defense Service Medal with "FLEET" clasp
  • Asiatic-Pacific Campaign Medal with one battle star
  • World War II Victory Medal
  • Philippine Presidential Unit Citation
  • Philippine Defense Medal
  • References

    USS Canopus (AS-9) Wikipedia