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Battery AMTB 5 - Fort Taylor (1943-1946) - Battery AMTB 5 - Fort Taylor was a reinforced concrete World War II rapid fire 90mm AMTB gun battery on Fort Taylor (2), Florida. Battery construction started and was completed in 1943. Deactivated in 1946.
Part of the Harbor Defense of Key West.
The AMTB battery at Fort Taylor (2) consisted of two fixed 90mm guns mounted on 90mm M3 gun mounts and two 90mm mobile guns held in storage. The two mobile 90mm guns and carriages were stored inside Fort Taylor (2). Concrete pads for both fixed guns were laid inside Fort Taylor (2), one in emplacement #2 of Battery Adair and one in the bastion next to Battery Adair. 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.
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."
References:
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)