The submarine you are thinking about was the USS Nautilus. It was the world's first nuclear powered submarine and commissioned into the US Navy in 1955
submersible boat
Navy
The Hunley sank with all hands after its attack.
The USS Nautilus (SSN-571) was the US Navy's first nuclear powered submarine.
He was an Irish Engineer who created the first submarine commissioned by the US Navy, and the first for the British Navy.
Royal Navy Submarine Museum was created in 1963.
The Trieste is now housed at the U.S. Navy Museum on the grounds of the Washington Navy Yard in Washington, D.C.
Royal Netherlands Navy Submarine Service was created in 1906.
The submarine was USS Redfish (SS-395).
The Ohio Class ballistic missile submarine at 560 feet in length.
This is not a "cut and dry" question. It depends on the pay grade and whether they are wearing their "dophins" or not. They cannot receive submarine pay until they finish the submarine qualifications and put on the submarine pin or "dolphins".