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NavSource Online: Mine Warfare Vessel Photo Archive

Courtesy of Al Grazevich

Left patch courtesy of Paul Haaze, center patch Wolfgang Hechler and right patch Mike Smolinski

Loyalty (MSO 457)

Call sign:
November - Juliet - Uniform - Romeo


Aggressive Class Minesweeper:

  • Laid down 9 November 1951 at Wilmington Boat Works, Inc., Wilmington, CA
  • Launched 22 November 1953
  • Commissioned USS Loyalty (AM-457), 11 June 1954
  • Reclassified as an Ocean Minesweeper, MSO-457, 7 February 1955
  • Struck from the Naval Register 1 July 1972
  • Sold for scrap 15 January 1974 by the Defense Reutilization and Marketing Service to Robert D. Perry of Vallejo, CA for $32,223.


  • Displacement 630 t.(lt), 755 t.(fl)
  • Length 172'
  • Beam 35'
  • Draft 10'
  • Speed 14 kts.
  • Complement 80
  • Armament: As built, one 40mm gun mount and 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 (both inboard engines replaced by Curtis-Wright [Packard] diesel engines), two shafts, two controllable pitch propellers.
    Click on thumbnail
    for full size image
    Size Image Description Source
    Loyalty 90k Photo from "Jane's Fighting Ships" Floyd Farrar
    Loyalty 68k - USS Loyalty
    Web Site
    Robert Gladwin
    Loyalty 55k Joe Radigan
    Loyalty 427k Inspecting a junk for contraband arms or supplies during Operation Market Time off the coast of South Vietnam
    U.S. Navy photo
    Robert Hurst
    Loyalty 201k This Vietnamese boat used a clever sign to help facilitate Market Time searches. Sailors from USS Loyalty (MSO 457), an oceangoing minesweeper, perform the search of the vessel assisted by a Vietnamese naval liaison, who is wearing a beret with Junk Force insignia. MSOs such as Loyalty played a crucial role in Operation Market Time, especially early in
    the war
    U.S. Navy photo K-31206
    Delta Squad
    Photo added 10 October 2020
    Fortify 115k Pearl Harbor, HI
    Inflict (MSO 456), Loyalty and Fortify (MSO 446)
    Richard Miller, BMCS, USNR, Ret.
    Loyalty 94k c. 1962. Off Long Beach, CA.
    Photo by George Arthur
    Floyd Farrar
    Engage 316k 13 December 1966
    Mine Division 71 Welcome Home pamphlet
    Tom Nutt
    Engage 173k
    Engage 169k
    Engage 181k
    Loyalty 130k c. 1969-70
    Off the coast of South Vietnam
    Loyalty approaching Niagara Falls (AFS-3) for replenishment
    Photo by William P. Jones, Medical Officer, USS Niagara Falls
    William P. Jones

    Commanding Officers
    01LT E. W. Riordan, USN11 June 1954 - 1955
    02LT Carl W. Plath, USN1955 - 1956
    03LCDR William Bruce Althoff, USN1956 - 1958
    04LCDR Alan Franklin Barnes, USN - USNA Class of 19471958 - 1960
    05LCDR James Dewey Taylor, Jr., USN1960 - 16 March 1962
    06LCDR Peter Hill Orvis, USN16 March 1962 - 1966
    07LCDR Thomas Scott Witherow, USN1966 - 1967
    08LCDR Raymond Patrick Connell, USN1967 - 1969
    09LCDR Larry Emarine, USN1969 - 1971
    Courtesy Wolfgang Hechler and Ron Reeves

    View the Loyalty (MSO-457)
    DANFS History entry located on the Naval History and Heritage Command Website
    Back to the Main Photo Index Back to the Mine Warfare Ship Photo Index Back to the Ocean Minesweeper (MSO) Photo Index

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    This page created by Gary P. Priolo and maintained by Joe Radigan
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