There are no walls in the Navy, either on land or at sea - only Bulkheads.
A "wall" on a ship is called a bulkhead
Bulkheads is the navy term for wall, therefor to keep the water in.
Deck. "Hit the deck" = "Get on the floor" etc.
A Seaman is the correct informal term for a Navy officer. Informal term for a sailor in the US Navy is "bluejacket".
A "standard" hitch in the Navy is 4 years.
Hatch
I haven't heard that term when relating to the US Navy. But in the Royal Navy SDG is a scubadiver
www.navyseals.com/navy-seal-history?page=0%2C1states 46 seals died in Vietnam. One would expect all are remembered on The Wall.
Nothing - Department of the Navy is the formal title for the Pentagon division that encompasses the U.S. Navy and the U.S. Marine Corps. Navy Department is an informal term.
The term 'Wailing Wall' was used by British soldiers in reference to the Western Wall of the Second Temple in Jerusalem. The term 'Wailing Wall' was an insult against Jews, implying that when Jews pray they wail.
The header is the 2x12 in the wall, I'm not sure the wall has a term.
The term "NAR" doesn't refer to a Navy ship - it's the standard Navy acronym for Naval Air Reserve.
The proper name is the Western Wall or kotel. the term "wailing wall" is a mistaken term created by British soldiers who didn't understand the Jewish style of prayer, and thought they were wailing.