HMAS Rankin (SSK 78)

The Australian Collins-class submarine, HMAS Rankin (SSK 78), enters Pearl Harbor for a port visit after completing exercises in the Pacific region. Rankin is currently testing the deployment of women on submarines after completing modifications to the boat. On Dec. 12, 1992, the Minister for Defense Science and Personnel announced that women would be eligible for service in the Collins-class submarines after a Submarine Integration Study (SIS). (U.S. Navy photo by Journalist Seaman Ryan C. McGinley)

HMS Tireless (S88)

The Royal Navy Trafalgar class attack submarine HMS Tireless sits on the surface of the North Pole. Tireless surfaced with the U.S. Navy Los Angeles-class attack submarine USS Hampton (SSN 767) for ICEX 04, a joint operational exercise beneath the polar ice cap. Both the Tireless and Hampton crews met on the ice, including scientists traveling aboard both submarines to collect data and perform experiments. The Ice Exercise demonstrates the U.S. and British Submarine Force's ability to freely navigate in all international waters, including the Arctic. (U.S. Navy photo by Chief Journalist Kevin Elliott)

KNM Utstein (KNM 302)

The Norwegian ULA class submarine Utstein (KNM 302) participates in NATO exercise Odin-One. The Norwegian submarine and other naval vessels joined U.S. active and reserve anti-submarine forces, including the stealth nuclear-powered submarine, USS Seawolf (SSN 21). The mission of the North Sea War-time exercise was to hunt Allied and NATO submarines. During the exercise, the “Emerald Knights” of Helicopter Anti-Submarine Squadron Seventy-Five (HS-75) logged nearly fifty hours of submarine contact within three days and performed countless simulated contacts and kills. Exercise Odin-One represents the strong Allied bond between the U.S. and Norway. (U.S. Navy photo)

USS Providence (SSN 719)

Sailors aboard the Los Angeles-class attack submarine USS Providence (SSN 719) cast off lines as the submarine departs Naval Submarine Base New London ahead of Hurricane Irene. (U.S. Navy photo by Mass Communication Specialist 1st Class Peter D. Blair/Released)