Six days later, Pearl Harbor was attacked, and the organization was sent on submarine patrol off the Atlantic coast.

Shades of Ernest Hemingway's private submarine patrols off Key West!

Van Slyke had a psychotic break under the stress of a submarine patrol.

During his war service, he accompanied a submarine patrol in the Bay of Biscay.

And that's why they almost certainly have a submarine patrol in there.

October 1984, Admiral, our last submarine patrol.

They entered the Mediterranean on the night of 27-28 November, taking over from Italian submarine patrols.

In recent years there have been only about ten nuclear submarine patrols a year, each lasting three months at most and usually a lot less.

However, since 1984, no submarine patrols are reported to have been conducted.

This submarine patrol is just one of the ways we make sure.