Battery AMTB 911

 (1943-1946) - Battery AMTB 911 was a reinforced concrete World War II AMTB rapid fire 90mm gun battery on Fort Terry, Plum Island, Suffolk County, New York. Battery construction started 18 May 1943 was completed on 28 Jun 1943 and transferred to the Coast Artillery for use 20 Dec 1943. Deactivated in 1946.

History
The AMTB battery at Pine Point consisted of two 90mm guns mounted on 90mm M3 fixed gun mounts and two 90mm guns mounted on 90mm M1A1 mobile gun mounts. Concrete firing platforms were laid 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. Ammunition was stored in igloo type magazines behind the batteries. Power was provided by two M-7 portable generator sets in revetments.



Current Status
No period gun or mounts in place.

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