12-inch coast defense mortar

The 12-inch coast defense mortar was a weapon of 12-inch (305 mm) caliber emplaced during the 1890s and early 20th century to defend US harbors from seaborne attack. In 1886, when the Endicott Board set forth its initial plan for upgrading the coast defenses of the United States, it relied primarily on mortars, not guns, to defend American harbors. Over the years, provision was made for fortifications that would mount some 476 of these weapons, although not all of these tubes were installed. Ninety-one of these weapons were remounted as railway artillery in 1918-1919, but this was too late to see action in World War I. The railway mortars were only deployed in small quantities, and none overseas. The fixed mortars in the Philippines saw action in the Japanese invasion in World War II. All of the fixed mortars in the United States were scrapped by 1944, as new weapons replaced them, and the railway mortars were scrapped after the war.

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coastal artillery weapon, mortar, railway gun, Watervliet Arsenal, 

12 cm kustartilleripjäs m/80, 12-inch Gun M1895, 7.5 cm tornpjäs m/57, Cannone da 152/50, Canon de 19 C modèle 1870/93, Canon de 24 C modèle 1876, coastal artillery weapon, mortar, railway gun, WA, 

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Location: KML, Cluster Map, Maps,

Frameless

111-SC-25733 - NARA - 55211001

111-SC-25735 - NARA - 55211005

111-SC-25734 - NARA - 55211003

12-Inch-Mortar-M1908

111-SC-21236 - NARA - 55202176

111-SC-30216 - NARA - 55219711

111-SC-11212 - NARA - 55182711

Btty-Whitman-As-Designed

2-Mortars-Ft-Wright

1890M1-Right-Side-BW

Type	Subtype	Date	Description	Notes	Source
commons	image		111-SC-25733 - NARA - 55211001		Commons
commons	image		111-SC-25735 - NARA - 55211005		Commons
commons	image		111-SC-25734 - NARA - 55211003		Commons
commons	image		12-Inch-Mortar-M1908		Commons
commons	image		111-SC-21236 - NARA - 55202176		Commons
commons	image		111-SC-30216 - NARA - 55219711		Commons
commons	image		111-SC-11212 - NARA - 55182711		Commons
commons	image		Btty-Whitman-As-Designed		Commons
commons	image		2-Mortars-Ft-Wright		Commons
commons	image		1890M1-Right-Side-BW		Commons