Battery AMTB 7 - Hancock

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Battery AMTB 7 - Hancock (1943-1946) - Battery AMTB 7 - Hancock was a reinforced concrete World War II AMTB rapid fire 90mm gun battery on Fort Hancock (2), Monmouth County, New Jersey. Battery construction started 3 Feb 1943, was completed on 19 Mar 1943 and transferred to the Coast Artillery for use on 22 Mar 1943 at a cost of $ 8,124.19. Deactivated in 1946.


Part of the Harbor Defense of Southern New York.
The AMTB battery at Fort Hancock (2) consisted of two 90mm guns mounted on 90mm M3 fixed gun mounts and two 90mm guns mounted on 90mm M1A1 mobile gun mounts. The mobile guns were held in storage and not emplaced. Concrete platforms were provided for both of the fixed guns. The battery had a dual mission of defense against fast enemy motor torpedo boats and enemy aircraft. The effective range of the guns was about 8,000 yards. Each weapon required a crew of 15, 9 men in the gun squad and 6 men in the ammunition squad.

AMTB Front View
AMTB Interior View
AMTB Side View
AMTB Back View

The above photos were taken at Fort Monroe, Battery Parrott

From FM 4-91: "This weapon consists of the 90-mm gun M1 and top carriage M1A1 on the 90-mm gun mount M3. The mount M3 is of the turret type, the shielding being constructed of boiler plates. This boiler plate shield provide fragmentation protection only. No shielding is provided at the rear due to the requirements for service of the piece. A sighting port in the shielding in front permits sighting in direction by the gun pointer."


  • FM 4-91 - 90-MM Gun, Fixed Mount Service of the Piece
  • FM 4-126 - Antiaircraft Artillery, Service of the Piece, 90-mm Antiaircraft Gun
  • TM 9-373 - 90-mm Gun M1 and 90-mm Gun Mount T3 (M3)

Battery AMTB 7 - Hancock Armament (edit list)
Model Serial
Manufacturer Carriage Service
1 90mm Rifle 186.15" M1 15187 Chevrolet Pedestal Mount, M3, #13107, GM 1943-1946
2 90mm Rifle 186.15" M1 15163 Chevrolet Pedestal Mount, M3, #1398, GM 1943-1946
Source: RCW Form 1 10 Dec 1943, Coast Defense Study Group, Berhow, Mark A. ed, American Seacoast Defenses: A Reference Guide, 2nd Edition, CDSG Press, McLean, VA, 2004, ISBN 0-9748167-0-1, pages 80-81, 207
Battery AMTB 7 - Hancock Plan

Battery AMTB 7 - Hancock Plan

Battery AMTB 7 - Hancock Plan

Current Status

No period gun or mounts in place.

Location: Fort Hancock, Monmouth County, New Jersey. Map point is not accurate.

Maps & Images

Lat: 40.471933 Long: -74.005531

  • Multi Maps from ACME
  • Maps from Bing
  • Maps from Google
  • Elevation: 24.37'


  • U.S.Army, Supplement to the Harbor Defense Project of New York, (HDNY-AN-44), 1 Sep 1944, CDSG


Visited: 14 Aug 2010

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