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Aggressive Class Minesweeper: Laid down 24 August 1953 as (AM-462) by Higgins Inc., New
Orleans, LA; Launched 3 January 1955; Redesignated
MSO-462, 7 February 1955; Commissioned USS Pinnacle (MSO-462),
21 October 1955; Decommissioned, Nov 24 1970; Struck from the Naval Register 1 November 1977; Sold for scrapping 1 May 1978
by the Defense Reutilization and Marketing Service to C. B. Herter, Hopewell, VA, for $26,491.
Specifications: Displacement 630 t.(lt), 755 t.(fl); Length 172'; Beam 35'; Draft 10'; Speed
14 kts; Complement 6 Officers, 74 Enlisted; Armament, as built, one single 40mm gun mount, two .50 cal. machine guns, final
configuration, bow gun replaced by one twin 20mm gun mount, two .50 cal. machine guns remain; Propulsion, four Packard ID1700
diesel engines, two shafts, two controllable pitch propellers.
These new minesweepers were smaller and built primarily of wood , with bronze and stainless (non-magnetic)
steel fittings to minimize their magnetic signature. All of the 1950 era MSOs had UQS-1 mine-locating sonar, later updated
with SQQ-14 sonar. MSOs were capable of sweeping for moored, bottom contact, magnetic and acoustic mines.
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WOODEN SHIPS AND IRON MEN a book by CDR David D.Bruhn USN RET.The history of our MSO's from 1953
to 1994. To learn more about this excellent minesweeper book please visit CDR Bruhn's website at the link below.
David Bruhn
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