Battery AMTB 21 - Fort Story

 (1943-194?) - Battery AMTB 21- Fort Story was a reinforced concrete World War II rapid fire 90mm gun battery on Fort Story, Virginia. AMTB stands for Anti Motor Torpedo Boat. Battery construction started on 25 Sep 1942, was completed on 31 Oct 1942 and transferred to the Coast Artillery for use 2 Aug 1943. Cost at transfer of the gun positions was $ 5,844.80 and the building cost $ 33,622.47. Deactivated in 194?.

History
The AMTB 21 battery at Fort Story consisted of two 90mm gun mounted on 90mm M3 gun mounts. Concrete pads for both these guns were laid in front of the combination plotting room, BC station, magazine and shell room building. 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.



Current Status
No period gun or mounts in place. The gun pads are gone but the ready ammunition shelters remain as does the combination plotting room, BC station, magazine and shell room building. Now used by the Harbor Master.

Sources:

Links: 
 * North American Forts - Fort Story, Battery AMTB 21