Related Clues:

• None has two
• Halves of 24-Down
• USN honcho
• Northern extremes?
• Innings' three?
• "London" has two
• Low-ranking U.S.N. officer
• Low-ranking off
• Wesley Crusher's rank on 'ST: TNG'
• Cincinnati triple
• Officer on a PT boat: Abbr
• The two for none?
• U.S.N.A. grad: Abbr
• Halves of 38-Across
• Three from nineteen