Related Clues:

• The 'N' of USNA
• The "N" of USNA
• Requiring free oxygen for respiration
• __ engineer (hydrodynamics specialist)
• Like military fleets
• Marine vehicle driven to port by a learner
• __ Academy (Annapolis military school)
• Relating to an armada
• Like JFK's military service
• Concerning warships
• Static, as an exercise
• Like a sea battle
• Having equal dimensions
• Having equal dimensions — that could engender eroticism
• Requiring free oxygen to breath