The USS Shad was laid down in 1941 and commissioned one year later. It conducted 11 war patrols and earned 6 battle stars for World War II activity. The submarine was built by Portsmouth Naval Shipyard in Maine. Nonetheless, since it came to life during the heyday of asbestos use, it most likely contained this toxic mineral in its wall insulation, which represented a terrible health hazard to the people who served on the vessel. If you were present on the USS Shad and experience symptoms such as a persisting cough, difficulty breathing or chest pain, we urge you to undergo a medical examination, as asbestos fibers might have damaged your lungs. The submarine was decommissioned in 1947 and sold for scrapping 18 years later.