I don't know if this is misspelling of the concrete ship S.S. Atlantus, the wreck of which lies just offshore from Cape May,NJ:
S.S. Atlantus They experimented with building concrete ships during WWI since steel was scarce, but none finished in time to serve in that conflict.
S.S. Atlantus was in service from 1919-1920, so the time line would be correct to have been the ship to save the submarine crew. The ship
Atlantus was to be scrapped and sunk to serve as a pier for the Cape May-Lewis Ferry, but broke from her mooring during a storm in 1926 and ran aground at the present location. During the 70's it got so cold the ocean froze near shore and people walked out to the wreck. Not much is left of the wreck that looks like a ship today, just a seaweed covered pile of concrete.
The
USS S-5 sank 17 miles off Cape May, NJ on September 1, 1920, and from the picture the rescue ship is the
S.S. Atlanus:
Another concrete cargo ship was the SS Sapona.
Grounded in the Caribbean and used for target practice.
I’ve dove and snorkeled it many time on dive trips.