The USS S-6 was a second-group S-class submarine built by Portsmouth Navy Yard in 1918. It was launched one year later, sponsored by Ms. Eleanor Westcott, and had Lieutenant Commander George B. Junkin in command. After trials and outfitting, the submarine departed New London, Connecticut, and joined Submarine Divisions 12 and 18 for what was to be the longest cruise of American submarines at that time. The voyage began with a rendezvous off Portsmouth, New Hampshire, and took the submarines through the Panama Canal, Pearl Harbor, and Philippine Islands. Because asbestos was present in large amounts on the USS S-6, the health of the military personnel aboard it was in great danger, as the inhalation or ingestion of asbestos fibers can lead to the development of serious diseases such as asbestosis, lung cancer, and mesothelioma. Therefore, everyone who was on this submarine needs to closely monitor their health, as the risk of coming to struggle with a disease is high. In 1931, the USS S-6 was decommissioned at Philadelphia, Pennsylvania, and in 1937, the submarine was struck from the Naval Vessel Register.