It might help if you posted some background to these.
I thought it'd be more fun if people took a whack at it themselves - especially since, given all the clues you're already given at face-value right on the drawing itself, it shouldn't be too hard to infer :p
Looking at them they appear to be survival shelters utilising old ship and sub hulls, buried in sand to protect against radiation.
You would be correct. TimothyC posted where it comes from and I'll see if I can get permission from Ryan to post the actual quotes. Anyway, BB-58 Indiana nearly became the "underground White House" - instead a more traditional concrete structure was built, underneath a golf course of all things (the latter did have the advantage of offering a lot more options on amenities and more White House-like features). Gato and Balao-class submarines were also looked at as being used as civilian shelters around coastlines, being buried on the beach - their pressure hulls were found to be extremely resilient against radiation blasts and therefore the only modifications necessary would've been to allow for air venting - something like less then 10 grand, if I remember correctly, would've been needed to "build" a shelter, and that includes final destination and burying costs. It was turned down and no hulls converted because there weren't a lot of hulls to go around, especially since at the same time this type of submarine was also really popular on the export market. Far more common types, like Liberty Ships, were also looked at, but if I recall correctly it was decided that these cheap, mass-produced hulls didn't take to being buried in deep sand or earth real well, let alone resisting a nuclear blast even with underground protection.