Related Clues:

• ''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!]
• Three short, three long, three short
• Familiar telegraphy sequence
• Ship's distress signal
• Desperate call
• Worrisome letters