Related Clues:

• Signal that had only existed for a few years when the RMS Titanic used it
• Scrubbing brand
• 'Wedding ___' (reality TV series)
• "Mayday!" cousin
• "Help!" on the high seas
• Marine "mayday"
• "Mayday!"
• Mariner's "Help!"
• Tapped-out message
• Help-wanted announcement
• Palindromic ABBA hit
• Ship's plea
• "Mamma Mia!" song
• "Mayday"
• Help-wanted indicator