The shipping authorities followed the ______ of the unidentified submarine on their radar screens.
The color of the signal flare sent up by a submarine about to surface due to an emergency condition within the submarine is().
During the day,a vessel picking up a submarine cable shall carry().
During the day,a vessel picking up a submarine cable shall carry().
The shipping authorities followed the ______ of the unidentified submarine on their radar screens.
The shipping authorities followed the ______ of the unidentified submarine on their radar screens.
During a training exercise a submarine indicating that a torpedo has been fired will send up smoke from a float. The smoke’s color will be().