Related Clues:

• 'Help wanted'
• International distress sig.
• "Not good!"
• Palindromic plea
• Words signifying trouble ahead
• Coast Guard pickup
• ''There's trouble ahead!''
• Emergency broadcast
• "Doesn't look good"
• Urgent letters
• 'I'm in trouble now'
• ... --- …
• Mariner's 'Mayday!'
• "We're in trouble"
• Letters in the sand, perhaps