Battery AMTB - Amaknak Spit

Battery AMTB - Amaknak Spit (1944-1950) - Battery AMTB - Unalaska Spit was a reinforced concrete World War II AMTB rapid fire 90mm gun battery on Fort Schwatka, Aleutians West Census Area, Alaska. Battery construction started ....., was completed ..... and transferred to the Coastal Artillery for use ..... . Deactivated in 1950. World War II Part of the Harbor Defense of Dutch Harbor. The AMTB battery at ..... consisted of two 90mm guns mounted on 90mm M3 fixed gun mounts, two 90mm guns mounted on 90mm M1A1 mobile gun mounts and two 37mm guns mounted on M3 mobile mounts. Concrete pads were provided for both fixed guns and often wooden gun platforms were provided for the mobile guns. Two earth covered concrete magazines provided protection for the ammunition. Electric power was provided by M-7 portable generators. 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 or 4.5 miles. 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." 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) Template:FtSchwatkaAMTB-UnalaskaSpitWWII File:Fort Schwatka Battery AMTB - Unalaska Spit.jpg Battery AMTB - Fort Schwatka Plan Current Status No period gun or mounts in place. {"selectable":false,"height":"-500","width":"-500"} Location: Unalaska Spit, Aleutians West Census Area, Alaska Maps & Images Lat: 53.90168 Long: -166.51180 Multi Maps from ACME Maps from Bing Maps from Google Elevation: .....' GPS Locations: 53.90168, -166.51180 See Also: Fort Schwatka Harbor Defense of Dutch Harbor Sources: U.S.Army, Supplement to the Harbor Defense Project Harbor Defenses of Dutch Harbor, (SRHDDH), 1944, CDSG Berhow, Mark A. ed, American Seacoast Defenses: A Reference Guide, 3rd Edition - PDF, CDSG ePress, McLean, VA, 2012, ISBN 0-9748167-0-1, page 80-81, 254-256, Links: CDSG Visited: No