This trench periscope was submitted by Elaine Etherington, it belonged to a member of her family, probably Leonard Etherington and was used during the 1st World War. An inscription on the ...

For the USS Cod, you'd level off at the submarine's periscope depth, which is 67 feet. You'd then use your search periscope to scan the horizon. The search periscope's wide field of view allows ...

A photo depicting an American nuclear-powered submarine poking its periscope above the waves—within shooting distance... Here’s What You Need to Remember: Virginia-class submarines are ...