File:US Navy 100409-N-3090M-330 Sailors lower the Submarine Squadron (SUBRON) 4 pennant during a change of command ceremony aboard the historic ship Nautilus.jpg - Wikimedia Commons

Submarine Photo Index

AS & SUBRON Submarine Tenders & Submarine Squadrons Groups

Subron 4 hi-res stock photography and images - Alamy

Submarine change of command hi-res stock photography and images

File:Navy Submarine Patrol Insignia.png - Wikipedia

Category:USS Nautilus (SSN-571) - Wikimedia Commons

AS & SUBRON Submarine Tenders & Submarine Squadrons Groups

AS & SUBRON Submarine Tenders & Submarine Squadrons Groups

USS Seadragon (SSN 584) Sailed Arctic Waters Following Log Book of

1982 - A port bow view of the Los Angeles class nuclear-powered

U.S. Navy Ships - Submarines

Navy History Matters