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| USS Orion (AS-18) | |
|---|---|
| Ship name | USS Orion (AS-18) |
| Ship namesake | Orion (constellation) |
| Builder | Cramp Shipbuilding Company |
| Launched | 1943 |
| Commissioned | 1943 |
| Decommissioned | 1993 |
| Fate | Scrapped |
| Class | Chesapeake-class submarine tender |
| Displacement | 21,500 long tons (full) |
| Length | 608 ft |
| Beam | 84 ft |
| Draft | 28 ft |
| Propulsion | Steam turbines |
| Speed | 20 knots |
| Complement | 1,200 officers and enlisted |
USS Orion (AS-18) was a Chesapeake-class submarine tender built for the United States Navy during World War II. She provided repair, logistics, and command support to submarine squadrons across the Atlantic Ocean, Pacific Ocean, and various forward bases during wartime and the ensuing Cold War. Orion's long service life encompassed major events and theaters including operations connected to the Asiatic-Pacific Theater, the Atlantic Charter era transitions, and Cold War naval deployments supporting ballistic and attack submarine forces.
Orion was laid down at the Cramp Shipbuilding Company yard in Philadelphia, Pennsylvania, launched in 1943 with sponsorship tied to prominent naval patrons, and commissioned into the United States Navy later that year. Her construction occurred alongside other auxiliary and tender programs prompted by expansions after the Attack on Pearl Harbor and directives from the Bureau of Ships to increase repair capacity for the Submarine Force, United States Pacific Fleet and the Submarine Force, United States Atlantic Fleet. She completed fitting out and trials under the oversight of shipfitters experienced from the New York Navy Yard and sea trials involving escorts from the Destroyer Squadron 20.
Designed as a large depot ship to service fleet submarines, Orion combined heavy machine shops, foundries, and spare parts storage with berthing and medical facilities to sustain extended submarine operations. Her capabilities included diesel and battery repair shops to support Gato-class submarine and Balao-class submarine overhauls, torpedo handling gear compatible with Mark 14 torpedo and later Mark 16 torpedo systems, and provisioning capacity for fuel and stores used by Fleet Submarine squadrons. The ship incorporated multiple boat and crane systems influenced by designs from the Philadelphia Naval Shipyard and weapon-support lessons from Naval Ordnance Laboratory research. Defensive armament and communications suites reflected standards developed after lessons from the Battle of the Atlantic and coordination requirements with Commander, Submarine Force, U.S. Pacific Fleet and Commander, Submarine Force, U.S. Atlantic Fleet staffs.
During World War II, Orion deployed to forward anchorages supporting submarine patrol rotations that struck Japanese shipping in the Western Pacific and combated Axis maritime logistics in the Atlantic Ocean. She serviced forward-deployed crews returning from war patrols and refitted boats between patrols, contributing indirectly to operations tied to the Solomon Islands campaign, the Philippine campaign (1944–45), and interdiction efforts related to Operation Galvanic supply lines. Orion coordinated with units such as Submarine Squadron 10, Submarine Squadron 6, and allied repair facilities like those at Cavite Navy Yard and later at Subic Bay to maintain high submarine sortie rates. Her wartime activity intersected with strategic initiatives overseen by Admiral Chester W. Nimitz and logistical directives from Chief of Naval Operations staff.
Following postwar drawdowns and the onset of the Cold War, Orion continued as a critical tender for both conventional and nuclear-capable submarine forces, serving in homeports and forward sites influenced by NATO and Pacific alliance strategies. She supported refits and maintenance for boats involved in Operation Ivy, Operation Crossroads aftermath operations, and early Polaris and Regulus program logistics as ballistic-missile submarine capabilities emerged. Deployments took Orion to ports such as New London, Connecticut, Pearl Harbor, Hawaii, Apra Harbor, Guam, and Mediterranean anchorages linking to Sixth Fleet logistics chains. The ship worked closely with organizations including Naval Sea Systems Command, Submarine Development Squadron units, and industrial contractors like Electric Boat for complex repairs and modernization overhauls. During crises such as the Cuban Missile Crisis period and heightened Vietnam War operations, Orion provided maintenance and rapid-turnaround services to sustain patrol tempo.
With shifting force structures, technological changes, and reductions in large auxiliary fleets, Orion was inactivated and decommissioned in the late 20th century under policies directed by the Naval Inactive Ship Maintenance Facility program and the Base Realignment and Closure processes. She was struck from the Naval Vessel Register and transferred for disposition, ultimately sold for scrap and dismantled by commercial breakers, a fate shared with numerous WWII-era auxiliaries retired in the post-Cold War drawdown overseen by the Defense Logistics Agency and maritime disposal contractors.
Orion earned campaign and service recognitions reflecting her service record, including American Campaign Medal-era service classification, Asiatic-Pacific Campaign Medal-era support credits, and Navy Meritorious Unit Commendation-style equivalents awarded to tenders and support units. Her crew received unit citations and personal awards coordinated through the Department of the Navy and documented in deck logs archived alongside records from the Naval History and Heritage Command.
Category:Chesapeake-class submarine tenders Category:World War II auxiliary ships of the United States Category:Cold War auxiliary ships of the United States