File:Flickr - Official U.S. Navy Imagery - Sailor helps another fire a .50-caliber machine gun.jpg - Wikimedia Commons
The Remarkable Story of a Howell Torpedo - U. S. Naval Undersea Museum
U s navy intelligence specialist 3rd hi-res stock photography and images - Alamy
Official U.S. Navy Page
Hampton Roads Naval Museum
File:Flickr - Official U.S. Navy Imagery - Former President Jimmy Carter wears a proximity suit..jpg - Wikimedia Commons
Official U.S. Navy Page
An icebreaker's summer break on the Great Lakes
Uss halyburton hi-res stock photography and images - Alamy