Merchant marines on a U.S. Navy ship?
USNS
not merchant marine crew. Her crew are civil service mariners. The officers and crew are employed by USNS and licensed by the U.S. Coast Guard.
She is not a “navy” ship. She is the property of USNS. Since she is a missile tracking ship with U.S. Air Force tracking radar on her, she may have a mil det. of Air Force radar operators or AF contract personnel.