Related Clues:

• Abba hit
• Hello, of a sort
• Urgent message
• Request for help
• Sturdy pad
• Deck call
• Titanic transmission
• Call at sea, maybe
• 'H-E-L-P!'
• Nautical attention grabber
• Call from the deck
• Offshore attention-getter
• Brillo pad competitor
• Chips ___! (cookie brand)
• Kin of 911