- Mine Planter Service (U.S. Army)
USAMP MP-7 Major General Wallace F. Randolph, Army M 1 Mine Planter Hull No. 480.
Records (#742), Special Collections Department, J. Y. Joyner Library, East Carolina University, Greenville, North Carolina, USA.
The U.S. Army Mine Planter Service (AMPS) was an outgrowth of civilian crewed Army mine planter ships dating back to 1904. It was established in 1918 under the U.S. Army Coast Artillery Corps to install and maintain the mine fields that were part of the principal armament of U.S. coastal fortifications, including those at the approaches to the Panama Canal and defenses of Manila Bay in the Philippines.
Prior to the formal Mine Planter Service establishment the Coast Artillery Corps had operated ships designated Mine Planters as well as an assortment of smaller vessels to establish and maintain the coastal defense mine fields. The ships, originating with vessels drafted into the work, were replaced by special construction in 1904 and 1909. Another block began with one ship, Gen. William M. Graham of 1917, and a group of nine constructed in 1919 to bring the fleet up to twenty planters in 1920. A massive Army reduction reduced that fleet to seven planters and one cable ship, the Joseph Henry. Many of those ships were transferred to the U.S. Lighthouse Service to later become U.S. Coast Guard vessels. No new ships were built until 1937 when one ship, the Lt. Col. Ellery W. Niles was delivered as the first diesel electric ship in the service. No further vessels would be planned until the block of ships in progress when the U.S. found itself in the midst of World War II and delivered 1942–1943.
Ship's crews had been civilian mariners operating the ship under a Coast Artillery officer who also commanded the embarked enlisted mine specialist. Friction had developed, in particular over civilian ship's officers and crews leaving to take other employment during operations. In 1916 the Chief of Coast Artillery recommended legislation militarizing these vessels. Two years later Congress granted the request.
The Army Mine Planter Service was formally established by act of Congress on 7 July 1918 as a part of the Coast Artillery Corps. By the same act the grade of Army Warrant Officer was established to provide officers as masters, mates, chief engineers and assistant engineers for the larger mine planting vessels, the Army Mine Planter (AMP). Mine Planter Service ship's officers wore distinctive sleeve insignia stripes similar to maritime and naval ships' officers with deck officers indicated by an anchor and engineering officers by a propellor.
These larger vessels, designated U.S. Army Mine Planter (USAMP), were supported by a variety of smaller craft to compose a submarine mine flotilla in planting and maintaining the mine fields associated with harbor approaches and coastal fortifications of the United States. The planters were supplemented by only slightly smaller Junior Mine Planters, Distribution Box Boats, mine yawls and assorted other small craft.
Those mine fields were composed of both contact mines, similar to conventional naval mines exploded by contact with a vessel, and controlled mines such as the M4 Ground Mine with a 3,000 pound TNT charge. Those mines were planted in planned groups at predetermined locations and connected to shore by electrical cables for firing when a target was observed to be within their effective range. The mines could be fired individually or as a group. The Distribution Box Boats were specially equipped to maintain the distribution boxes that joined the individual mines within a mine group to the main cable connecting the group to the mine casemate.
A mine planter service had been in operation since 1904 starting with vessels not specifically designed for the work augmented by new construction in 1904 and more built in 1909. During the period before the formal establishment of a military crewed AMPS in 1918 the vessels had been operated by civilians. With formal establishment of the AMPS and the Warrant Officer grades to provide officers for the ships the service became an entirely military operation.
Early mine planter class ships of the AMPS were capable of planting the mines but did not have specific cable laying or maintenance capability. Two Signal Corps vessels with that capability were used and eventually taken into service for that function. Studies of those capabilities led to an increased cable capability in a ship constructed in 1917 and the later ships constructed in 1919. At least one of those vessels went on to cable work after disposal by Army. Full mine and cable capability was integrated in the single new ship built in 1937, the Lt. Col. Ellery W. Niles. At the entry of the United States into World War II sixteen new Army Mine Planter vessels were either under construction or planned. All had dual capability and several, including the Niles, went on to operate as small cable ships after Army service.
World War II quickly demonstrated the obsolete nature of the static coastal defenses of which the mine fields were considered part of the principal armament. By the end of the war the forts were standing down and the Navy had been given responsibility for all mine operations. Many of the 1942 and 1943 construction vessels were transferred to Navy to be converted to Auxiliary Minelayers (ACM) where they were armed and modified for mine operations more in the nature of the naval mine warfare model. The ship’s mine planting capability was similar to buoy tender capability and that was included in the naval mission and later U.S. Coast Guard service.
The Mine Planter Service itself had faced major change during and at the end of the war with its ships and role in mining transferred to the Navy. The Coast Artillery Journal for March–April 1948 noted joint training with Navy and how USAMP Spurgin was serving as a "floating laboratory" and to see "as many Navy hands as soldiers aboard the Spurgin as she works in the San Francisco harbor entrance". The Army Mine Planter Service was officially terminated by the 1954 Warrant Officer Personnel Act.
The mine planters turned over to the U.S. Navy were the core of the Auxiliary Minelayer (ACM / MMA) group of the United States Lighthouse Service and became the Speedwell class. The 1909 General Samuel M. Mills became the Coast Guard cable ship edit] See also
- Submarine mines in U.S. harbor defense
- ^ http://shipbuildinghistory.com/history/smallships/armyminecraft.htm | Shipbuilding History - U.S. Army Mine Craft
- ^ http://www.militarymuseum.org/Mines.html | The California State Military Museum - Submarine Mine Defense of San Francisco Bay
- ^ "History of Army Mine Planters". Coast Artillery Journal LXXXII. September–October 1939.
- ^ "The Army Mine Planter Service". Coast Artillery Journal 70: 469–472. June 1929.
- ^ http://usawocc.army.mil/History/index.htm | U.S. Army Warrant Officer Career Center - Origin and Early History
- ^ http://www.tioh.hqda.pentagon.mil/Rank_page/WarrantOfficers.htm | WARRANT OFFICERS INSIGNIA OF GRADE
- ^ http://www.fortmiles.org/firepower/batteries/batt8.html#AMP | Ft. Miles - Army Mine Planters, organization table
- ^ http://www.fortmiles.org/firepower/batteries/batt8.html | Ft. Miles - Principal Armament - Mine Field
- ^ http://patriot.net/~eastlnd2/Misc.htm#Hunt | R/V F. V. Hunt (ex Niles)
- ^ "The Seacoast Branch, The Artillery School". Coast Artillery Journal LXXXXI: p. 69. March–April 1948.
- ^ http://www.navsource.org/archives/11/01idx.htm | NavSource - Auxiliary Minelayer (ACM / MMA)
- ^ Speedwell, 1923 - Class History
- ^ http://www.uscg.mil/history/webcutters/Pequot.pdf | USCG History - Pequot, 1922
- Ft. Miles - Principle(sic) Armament - Mine Field
- The California State Military Museum - Submarine Mine Defense of San Francisco Bay
- Army Ships -- The Ghost Fleet - Coast Artillery Corps - Army Mine Planter Service
- Shipbuilding History - U.S. Army Mine Craft - MP, L and M
- U. S. Army Warrant Officers Association - LET GO! (W.O. print showing mine flotilla)
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