Stopped by one of my favorite locations at Fort Lee on a foggy morning. While she might look big, a Krupp V5 German railgun nearly twice the size sits in a museum on base. The placard at the base of the guns says: Built at Watervliet aresenal in NY about 1900. A railway mount (model of 1918) was built by the Marion Steam Shovel co., Marion, Ohio 1920. It's the oldest remaining 12" gun mount on railway and is still in firing condition. It was used as a primary coast defense weapon through the 1920s. In 1942 the Navy acquired it from Aberdeen proving ground, MD. It was then used for the ballistic test of bombs and various proof of test exercises.
