Laid down by Portsmouth Navy Yard in 1918, the USS S-8 was a second-group S-class submarine belonging to the U.S. Navy. Along with the other submarines from the Submarine Divisions 12 and 18, it embarked on what was to be the longest cruise ever undertaken by American submarines in 1920. Following a rendezvous off New Hampshire, the vessels proceeded through the Panama Canal and California to Hawaii, reaching Pearl Harbor in 1921. Subsequently, they went to Cavite and Luzon in the Philippine Islands. In 1924, the submarines finally departed Cavite and arrived at Mare Island, California. Asbestos, a naturally occurring mineral, is highly carcinogenic to humans, which is why people who served aboard the USS S-8 need to pay close attention to their health. It was used as a building material in tremendous amounts during the last century by the U.S. Navy, being present on the USS S-8 as well, mostly in the form of insulation. The diseases exposure to asbestos can lead to include lung cancer and mesothelioma, a very aggressive type of cancer that affects the outer lining of the lungs. In 1931, the USS S-8 was decommissioned and in 1937, the submarine was eventually struck from the Naval Vessel Register.