Related Clues:

• ''Help, quick!''
• ''I'm foundering!''
• Pad name
• 'Hel-l-lp!'
• Sign of desperation
• It might be sent from a bridge
• Message from a bridge
• Help-wanted request
• 2006 Rihanna hit
• "Send the Coast Guard!"
• Plea to the Coast Guard
• Call to the Coast Guard
• Hit song by ABBA
• Signal that had only existed for a few years when the RMS Titanic used it
• Scrubbing brand