Related Clues:

• Shipwreck signal
• Theme of the puzzle
• Abba hit
• Urgent message
• Request for help
• Sturdy pad
• Help wanted abbr.
• Titanic transmission
• Call at sea, maybe
• 'H-E-L-P!'
• Brillo pad competitor
• Job ad inits.
• Kin of 911
• Call for help
• Clorox brand