Related Clues:

• Call at sea, maybe
• 'H-E-L-P!'
• Brillo pad competitor
• Kin of 911
• Call for help
• Clorox brand
• Sea plea
• ...
• Help wanted announcement?
• Call letters?
• Castaway's note
• Mayday relative
• Request for rescue
• Emergency message
• Poseidon's call