Related Clues:

• Mariner's affirmative
• Yes, on board
• "Yes," at sea
• Maritime agreement
• Word that sounds like a vowel it hasn't
• Seagoing 'I see'
• 'Correct, cap'n'
• Sailor's "OK"
• Seagoing "I see"
• "Correct, cap'n"
• "Yes, captain!"
• Response to 'All in favor'
• Vote for a second person that's old-fashioned
• Yes to a skipper
• 'Understood' 39-Across