The USS Indianapolis (SSN-697) was a U.S. Navy Los Angeles class fast attack submarine. She was commissioned in 1980 and was assigned to the Pacific Fleet, homeported in Pearl Harbor. She was decommissioned halfway through her service life in 1998, one of the many victims of the so-called “peace dividend”.
I have always been fascinated by submarines, particularly the U.S. Navy nuke boats. It just so happens that the outer diameter of 5 inch PVC well casing is almost exactly the hull diameter of the LA class submarine in 1/72 scale. The center 30 inches of the model is 5 inch PVC, the bow and stern sections are vacuformed over poplar masters. The fins and sail were made from plastic sheet and copies cast in resin.
For anyone interested, there are work in progress construction posts here: https://inchhighguy.wordpress.com/2019/03/08/1-72-scale-los-angeles-class-ssn-build-part-i/