The PGM-39-class gunboats, designated Patrol Gunboat, Motor [a] by the United States Navy were a class of fifty nine gunboats constructed in various shipyards from 1959–1970. The design was based on the United States Coast Guard Cape …

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-1 s were converted from SC-497 -class submarine chasers .

USS PGM-18 was a PGM-9-class motor gunboat built for the United States Navy during World War II. She was built and originally commissioned as USS PC-1255, a PC-461-class submarine chaser, and was decommissioned and converted in late 1944. USS PGM-18 struck a mine off the coast of Okinawa in April 1945; 13 men lost their lives when PGM-18 sank.

Note: All Motor Gunboats (PGM)s, hull numbers 84 and greater, in the U. S. Navy inventory 1 April 1967 were redesignated Patrol Gunboats (PG)s. The term Motor Gunboat now applies primarily to craft built for allied navies.

There was one major modification of the 173-foot PC with twenty-four ships being converted to Patrol Gunboat, Motor (PGM). The PGM was designed to operate with PT squadrons, supplying added fire power, during enemy "barge-busting" operations.

All U.S. Navy Gunboats of World War II. Listed by type and class, with descriptions and links to individual ships.

Since WWII, the Navy has built 112 gunboats, 95 of them under the Foreign Military Sales program. This fleet includes 75 Patrol Gunboats Motor (PGM), 5 Patrol Frigates Multi-Mission (PFMM), 9 Patrol Gunboats Guided-Missile (PGG) and 6 Patrol Chasers Guided-Missile (PCG).

The PGM-1 class motor gunboats were a class of eight gunboats converted for the United States Navy from 1943-1944 and were succeeded by the PGM-9 class motor gunboat. All eight PGM-1s were converted from SC-497 class submarine chasers.

The U-boat War in World War Two (Kriegsmarine, 1939-1945) and World War One (Kaiserliche Marine, 1914-1918) and the Allied efforts to counter the threat. This section includes over 21.000 Allied Warships and over 11.000 Allied Commanders of WWII, from the US Navy, Royal Navy, Royal Canadian Navy, Royal Australian Navy, The Polish Navy and others.

PGM Motor Gunboat SC-1072, a 95-ton 110-foot submarine chaser built at Camden, New Jersey, was commissioned in June 1943. Late in that year, she was converted to a motor gunboat and renamed PGM-7.