Related Clues:

• Urgent call at sea
• Brillo alternative
• Mariner's distress signal
• Mayday rel.
• Help-wanted notice?
• ''Mayday!'' cousin
• Mariner's signal
• Dit-dit-dit-dah-dah-dah-dit-dit-dit
• ''___ yer old man!''
• Flare, perhaps
• Watery 911
• Foundering plea
• "Help!"
• 'Help us!'
• [I'm in trouble here!]