Possible Clues:

• Where ships are in peril, Pacific port offers sanctuary to sailor
• Avoid a court case involving a graduate fighting the crafty types over water
• Fit a seat belt for those with the real big batteries
• Aeschylus' play 'The Persians' is about one
• Armada action
• From River Plate, say, sailor enters American port
• Conflict involving sailor in American port
• Danger in the ocean