Ordered in 1916, the USS R-7 came to life one year later and was launched in April 1919. In general, ships and submarines build after 1920 pose a risk for asbestos exposure. Nevertheless, in the case of this submarine, there might be a risk as well, since it was decommissioned for 9 years, a time during which asbestos might have been added to it. Thus, we highly advise people who served on it after 1940 to keep a close eye on the health of their lungs. In October 1945, the submarine was finally decommissioned and afterwards sold for scrap.