Related Clues:

• Sub assent
• Backer's word
• Sailor's sure thing?
• Shipmate's reply
• Opposite of 29-Down
• Bluto's assent
• 'Yes, captain!'
• Consenting vote
• Nay antithesis
• Sailor's "Agreed"
• Marine assent
• "Yes," asea
• Call for passage
• Shipboard affirmative
• 'Roger'