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PGM-9 Class, U.S. Motor Gunboats


Photograph of PGM-9 motor gunboat

National Archives. Via NavSource.org

Schematic diagram of PGM-9 class gunboat

ONI 222

Specifications:

Tonnage 450 tons standard displacement
Dimensions 173'8" by 23' by 10'10"
52.93m by 7.01m by 3.30m
Maximum speed       20.2 knots
Complement 65
Armament 1 3"/50 AA gun
1 40mm Bofors AA guns
6 20mm Oerlikon AA guns
1x2 0.50 machine gun
1 60mm mortar
Machinery
2-shaft diesel (5760 hp)
Sensors
SO-8 radar


The PGM-9s were units of the PC-461 class converted on the ways by removing all antisubmarine warfare gear in favor of addional machine guns, a 60mm mortar, and SO-8 radar. Originally meant to operate with PT boats, they proved too slow for this role, and usually worked with minesweepers instead. 

Some 24 units were so converted between July 1944 and February 1945.

References

Navsource.org (accessed 2011-4-26)


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