This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "List of mine warfare vessels of the United States Navy" – news · newspapers · books · scholar · JSTOR (May 2012) (Learn how and when to remove this template message)
Ships of the
United States Navy
Ships grouped alphabetically
Ships grouped by type

This is a list of mine warfare vessels of the United States Navy.

Ship status is indicated as either currently active [A] (including ready reserve), inactive [I], or precommissioning [P]. Ships in the inactive category include only ships in the inactive reserve, ships which have been disposed from US service have no listed status. Ships in the precommissioning category include ships under construction or on order.


Mine warfare consists of: minelaying, the deployment of explosive naval mines at sea to sink enemy ships or to prevent their access to particular areas; minesweeping, the removal or detonation of enemy naval mines; and degaussing, the process of decreasing or eliminating a remnant magnetic field in a ship's hull to prevent its detection by enemy magnetic mines. The US Navy has operated ships and craft for all three purposes. Mine planting is the laying and maintenance of controlled mines, which was traditionally a role of the US Army.


Mine warfare ships were considered by the US Navy to be either auxiliaries or yard and district craft, and so were given hull classification symbols beginning with either 'A' or 'Y', depending on their capabilities. The exceptions were minelayers which were given hull symbols beginning with 'C', and converted destroyers which were given hull symbols beginning with 'DM'. On 7 February 1955 all of these ships and craft still in service or reserve were reclassed and received new hull symbols beginning with 'M', usually without change of hull number. Modern Littoral Combat Ships use 'L' hull symbols even though they can be used for mine warfare.

Auxiliary Minelayers (ACM)

All ACMs except USS Buttress and USS Monadnock were originally US Army mine planters.





Degaussing Ships (ADG)

Further information: Degaussing

Minesweepers (AM)




Raven-class minesweepers


Auk-class minesweepers




Albatross-class minesweepers


Kite-class minesweepers




Adroit-class minesweepers

All ships of this class were converted to submarine chasers (PC)


Hawk-class minesweepers


Main article: List of Admirable-class minesweepers

Algerine-class (built for the United Kingdom)

These minesweepers were built for the U.K. and redesignated from an AM hull number to a J hull number. Most were returned to the US at the end of Lend-Lease.

Agile- or Aggressive-class

These classes have considerable overlap; some ships are considered both Agile- and Agreessive-class.[by whom?] A few more are occasionally considered Dash-class.

Agile-class minesweepers

Accentor- or Acme-class


Other/unknown class

Auxiliary Base Minesweepers (AMb)

Coastal Minesweepers (AMc)







Frigate Bird-class




Accentor-class minesweepers





Other/unknown classes

Many coastal minesweepers were civilian ships purchased by the US Navy and then converted for use as minesweeper ships. Among them are various designs and makes of yachts, fishing vessels, and other ships.

Coastal Minesweepers (Underwater Locator) (AMCU)

On 7 February 1955, all AMCU's were redesignated as Coastal Minehunters (MHC). Hull numbers were not changed.


All AMCU-7 class minesweepers were conversions of Landing Craft Infantry.[2]



Other/unknown classes

Ocean Minesweepers (AMS)


Adjutant- or Bluebird-class

The name of this class of ships internationally is Adjutant, named for the USS Adjutant (AMS-60), which was cancelled and transferred to Portugal as the Ponta Delgada (M 405). The first commissioned ship of this class in the US Navy was the USS Bluebird (AMS-121), hence its US Navy class name.


Other/unknown classes

British Minesweepers (BAM)

For more vessels of this class see Catherine class minesweeper

Minelayers (CM)

Converted steamships and freighters

These ships were converted steamships and freighters used from 1918-1919 for minelaying during World War I.


San Francisco-class



Other/unknown classes and unique ships

Coastal Minelayers (CMc)

Light Minelayers (DM)


These ships were originally designated as Wickes-class destroyers and later reclassified to light minelayers around 1920.


These ships were originally designated Clemson-class destroyers and later reclassified as light minelayers in 1937.

Robert H. Smith-class

These ships were originally designated Allen M. Sumner-class destroyers but were converted to Robert H. Smith-class destroyer minelayers in 1944. In 1955 they would be reclassified as Fast Minelayers (MMD).

High Speed/Destroyer Minesweepers (DMS)

Further information: Destroyer minesweeper




Mine Countermeasures Ships (MCM)


Further information: Avenger-class mine countermeasures ship

Mine Countermeasures Support Ships (MCS)

Many Mine Countermeasures Support (MCS) ships were previous vehicle landing, tank landing, dock landing, or amphibious assault ships that were reclassified to the MCS type in later years.





Iwo Jima-class

Coastal Minehunters (MHC)

On 7 February 1955, all Coastal Minesweepers (Underwater Locator) (AMCU)s were redesignated as MHCs. Hull numbers were not changed. Bobolink, Bunting, and the Osprey class never had AMCU designations.


aka AMCU-7 class



Other/unknown classes


Main article: Osprey-class minehunter

Coastal Minelayers (MMC)


LSM-1 class

At least 9 Landing Ship Mediums were converted into coastal minelayers for transfer to NATO allies.[9]

unknown class

Fast Minelayers (MMD)

Fast Minelayers (MMD) were originally classed as Light Minelayers (DM), but were redesignated in 1955. Hull numbers were not changed.[10]

Robert H. Smith-class

Fleet Minelayers (MMF)


Minesweepers, Coastal (MSC)




Unknown/other class

Minesweepers, Coastal (Old) (MSC(O))

All Ocean Minesweepers (AMS) which were originally YMS-1-class minesweepers and still on hand on 7 February 1955 were redesignated as Minesweepers, Coastal (Old) (MSC(O)). Hull numbers were not changed.


Minesweepers, Steel Hulled (MSF)

All MSF vessels were originally classed as AM minesweepers prior to 7 February 1955. Hull numbers were not changed.




Inshore Minesweepers (MSI)

Minesweepers, Ocean (MSO)

All MSO vessels were originally classed as AM minesweepers prior to 7 February 1955. Hull numbers were not changed.

Agile- or Aggressive-class

Ships of this class are variously called Agile- or Aggressive-class depending on source. Some four ships are also sometimes named as a part of a distinct Dash-subclass.



Minesweepers (Special Device) (MSS)

Note that the official classification of these as devices rather than ships accounts for these ships absence of listings among the Navy's ships while designated MSS-1 and MSS-2.

Patrol Craft Sweepers (PCS)

At least 90 patrol craft (PC) were converted to minesweepers.

Submarine Minelayers (SM)

Main article: List of submarines of the United States Navy

Degaussing Craft (YDG)

Further information: Degaussing

Motor Mineplanters (YMP)

Main article: Mine planter

Mineplanters were used to plant and maintain controlled mines for harbor defense; since the US Army had the primary responsibility for these minefields it is likely that the YMP hull designation was seldom used.

Auxiliary Motor Mine Sweepers (YMS)

All Auxiliary Motor Mine Sweeper (YMS) ships to date are YMS-1-class, which itself has multiple subclasses.




Littoral Combat Ships (LCS)

Main article: Littoral combat ship

Further information: Littoral combat ship § Mine countermeasures module

The Littoral Combat Ships can carry Mine Warfare Modules which operate unmanned vehicles of various types for mine clearance operations.


Main article: Freedom-class littoral combat ship


Main article: Independence-class littoral combat ship

See also



  1. ^ "Barcelo (IX-199)"
  2. ^ Friedman, 2002, pp 148, 581-614
  3. ^ a b c d e f g h i j Belknap, Reginald Rowan The Yankee mining squadron; or, Laying the North Sea mining barrage (1920) United States Naval Institute p.110
  4. ^ a b c d e f g h Silverstone, Paul H. U.S. Warships of World War II (1968) Doubleday pp. 205–209
  5. ^ a b c d e f g h i j k l m n o p q r s t Silverstone, Paul H. U.S. Warships of World War II (1968) Doubleday p.212
  6. ^ "USS Dorsey (DMS-1)". Naval History and Heritage Command. Retrieved 2022-08-12.)
  7. ^ "USS Southard (DMS-10)". Naval History and Heritage Command. Retrieved 2022-08-12.)
  8. ^ Ian Johnston (17 January 2013). "US Navy ship stuck on reef nearly a day after running aground off Philippines". NBC News. Retrieved 17 January 2013.
  9. ^ Friedman, 2002, pp 521-541
  10. ^ "MMD : MINELAYER, FAST".
  11. ^ " - photogallery". Retrieved 2021-03-27.
  12. ^ "MSO-523". Retrieved 2021-03-27.
  13. ^ "Casualties Navy and Coast Guard Ships - Continued".
  14. ^ "USS YMS-14". NavSource Online. Retrieved 2022-08-12.)
  15. ^ 32 YMS-1 class vessels were lost in US Naval service, 2 in Korea with the AMS classification. (See: "YMS class Minesweepers". Retrieved 2007-12-20.)
  16. ^ "USS YMS-19". Retrieved 2022-08-12.)
  17. ^ "USS YMS-21". NavSource Online. Retrieved 2022-08-12.)
  18. ^ "USS YMS-24". NavSource Online. Retrieved 2022-08-12.)
  19. ^ "USS YMS-30". NavSource Online. Retrieved 2022-08-12.)
  20. ^ "USS YMS-39". NavSource Online. Retrieved 2022-08-12.)
  21. ^ "USS YMS-48". NavSource Online. Retrieved 2022-08-12.)
  22. ^ "USS YMS-50". NavSource Online. Retrieved 2022-08-12.)
  23. ^ "USS YMS-70". NavSource Online. Retrieved 2022-08-12.)
  24. ^ "USS YMS-71". NavSource Online. Retrieved 2022-08-12.)
  25. ^ "USS YMS-84". NavSource Online. Retrieved 2022-08-12.)
  26. ^ "USS YMS-98". NavSource Online. Retrieved 2022-08-12.)
  27. ^ "USS YMS-103". NavSource Online. Retrieved 2022-08-12.)
  28. ^ "USS YMS-133". NavSource Online. Retrieved 2022-08-12.)
  29. ^ "USS YMS-146". NavSource Online. Retrieved 2022-08-12.)
  30. ^ "USS YMS-275". NavSource Online. Retrieved 2022-08-12.)
  31. ^ "USS YMS-304". NavSource Online. Retrieved 2022-08-12.)
  32. ^ "USS YMS-341". NavSource Online. Retrieved 2022-08-12.)
  33. ^ "USS YMS-350". NavSource Online. Retrieved 2022-08-12.)
  34. ^ "USS YMS-365" (PDF). NavSource Online. Retrieved 2022-08-12.)
  35. ^ "USS YMS-378". NavSource Online. Retrieved 2022-08-12.)
  36. ^ "USS YMS-383". NavSource Online. Retrieved 2022-08-12.)
  37. ^ "USS YMS-385". Retrieved 2022-08-12.)
  38. ^ "USS YMS-409". NavSource Online. Retrieved 2022-08-12.)
  39. ^ "USS YMS-421". Retrieved 2022-08-12.)
  40. ^ "USS YMS-424". NavSource Online. Retrieved 2022-08-12.)
  41. ^ "USS YMS-481". NavSource Online. Retrieved 2022-08-12.)
  42. ^ "USS YMS-454". NavSource Online. Retrieved 2022-08-12.)
  43. ^ "USS YMS-472". NavSource Online. Retrieved 2022-08-12.)
  44. ^ "USS YMS-478". Retrieved 2022-08-12.)