Murder in the Submarine Zone (also published as "Nine—And Death Makes Ten" and "Murder in the Atlantic") is a mystery novel by the American writer John Dickson Carr (1906–1977), who published it under the name of Carter Dickson. It is a whodunnit and features the series detective Sir Henry Merrivale.
Murder in the Submarine Zone was published in nineteen hundred fifty six.
It's never mentioned when the book was published. It's difficult because I guess using words to refer to a specific year causes the system to be confused.