The PGM-1-class motor gunboats were a class of eight gunboats converted for the United States Navy from 1943 to 1944 and were succeeded by the PGM-9-class motor gunboats. All eight PGM-1s were converted from SC-497-class submarine chasers. The PGM-1s were created to support PT boats in the Pacific, but were too slow to keep up. The PGM-1s were discontinued and the PGM-9s, also too slow, were shifted to support minesweeping ships instead.
 PGM-2 after her conversion
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| Class overview | |
|---|---|
| Operators |  United States Navy |
| Preceded by | Erie class |
| Succeeded by | PGM-9 class |
| Built | 1942-1943 |
| Planned | 8 |
| Completed | 8 |
| Lost | 1 |
| General characteristics | |
| Type | Patrol gunboat, motor (PGM) |
| Displacement | 95 tons |
| Length | 110 ft 10 in (33.8 m) |
| Beam | 23 ft (7.0 m) |
| Draft | 10 ft 10 in (3.30 m) |
| Propulsion |
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| Speed | 21 knots (39 km/h; 24 mph) |
| Armament |
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PGM-7 was the only PGM-1-class vessel lost in World War II. The others were sent to the Foreign Liquidation Commission in 1947. Their exact fate is unknown.