USS S-46 (SS-157)
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| History | |
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 United States
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| Name: | USS S-46 |
| Builder: | Bethlehem Shipbuilding Corporation |
| Laid down: | 23 February 1921 |
| Launched: | 11 September 1923 |
| Commissioned: | 5 June 1925 |
| Decommissioned: | 2 November 1945 |
| Struck: | 16 November 1945 |
| Fate: | Sold for scrapping, November 1946 |
| General characteristics | |
| Class and type: | S-class submarine |
| Displacement: | 850 long tons (864 t) surfaced, 1,126 long tons (1,144 t) submerged |
| Length: | 225 ft 3 in (68.66 m) |
| Beam: | 20 ft 8 in (6.30 m) |
| Draft: | 16 ft (4.9 m) |
| Speed: | 14.5 knots (16.7 mph; 26.9 km/h) surfaced, 11 knots (13 mph; 20 km/h) submerged |
| Complement: | 42 officers and men |
| Armament: | 1 × 4 in (100 mm)/50 deck gun, 4 × 21 inch (533 mm) torpedo tubes |
| Service record | |
| Operations: | World War II |
| Victories: | 1 battle star |
USS S-46 (SS-157) was a third-group (S-42) S-class submarine of the United States Navy. Her keel was laid down on 23 February 1921 by the Bethlehem Shipbuilding Corporation's Fore River Shipyard in Quincy, Massachusetts. She was launched on 11 September 1923 sponsored by Miss Grace Roosevelt, and commissioned on 5 June 1925, Lieutenant Commander Hubert V. LaBombard in command.
After training exercises off southern New England, S-46 sailed for the Panama Canal Zone to join Submarine Division 19 (SubDiv 19). Arriving at Coco Solo on 26 September, she commenced a schedule of local operations from Coco Solo and Balboa, Panama, which were interrupted only for semi-annual extended training cruises and annual fleet problems in the Caribbean Sea and Pacific Ocean. Repairs and overhauls were performed at Balboa.
In 1927, SubDiv 19 was transferred to the Battle Fleet and based at San Diego, California, with Mare Island Naval Shipyard as homeyard for its boats. S-46 departed Panama on 11 June, arrived at San Diego on 31 July, then proceeded to Pearl Harbor to participate in tactical exercises with other Battle Fleet submarines. During the latter part of August, she participated in the search for missing Dole Air Race pilots, and at the end of the month, she headed back to San Diego for two months of local operations. In December, she returned to Mare Island for an overhaul, and in June 1928, she resumed operations out of her home port. In November, despite many attempts to improve design limitations of the third-group (S-42) class, the maximum speed set for S-46, and others of that class, was reduced to 10.5 knots to eliminate excessive vibration and accompanying engineering problems at higher speeds.
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