Please report any broken links or trouble you might come across to the Webmaster. Please take a moment to let us know so that we can correct any problems and make your visit as enjoyable and as informative as possible.


NavSource Online: Mine Warfare Vessel Photo Archive

Pioneer (AM/MSF 105)


Pioneer served the Navies of the United States and Mexico.

Auk Class Minesweeper: Laid down, 30 October 1941 by the Pennsylvania Shipyards, Inc., Beaumont, TX; Launched, 26 July 1942; Commissioned USS Pioneer (AM 105), 27 February 1943; Decommissioned, 8 July 1946 at San Diego, CA; Reclassified a Fleet Minesweeper (Steel-hulled) MSF-105, 7 February 1955; Struck from the Naval Register, 1 July 1972; Sold to Mexico, 19 September 1972 and renamed Leandro Valle (C 70). Fate unknown. Pioneer earned four battle stars for World War II service.

Specifications: Displacement 1,250 t.; Length 220' 6"; Beam 32'; Draft 10' 9"; Speed 18 kts; Complement 105; Armament one single 3"/50 gun mount, two twin 40mm gun mounts, two single 20mm gun mounts, two depth charge tracks, five depth charge projectiles; Propulsion, diesel.
Click On Image
For Full Size Image
Size Image Description Source
Pioneer 78k . .

View the Pioneer (AM/MSF 105)
DANFS History entry located on the Haze Gray & Underway Web Site. The main archive for the DANFS Online Project.

Crew Contact And Reunion Information
U.S.Navy Memorial Foundation
Fleet Reserve Association

Additional Resources and Web Sites of Interest
Naval Minewarfare Association
Association of Minemen
Back To The Main Photo Index Back To the Mine Ship Photo Index Back To The Mine Sweeper (AM) Photo Index

Comments, Suggestions, E-mail Webmaster
This page created and maintained by Joseph M. Radigan
© 2003 Joseph M. Radigan © 1996 - 2003 NavSource Naval History. All Rights Reserved.