Related Clues:
- Brand of pads
- Frantic transmission
- 'Help a seafarer out!'
- 'Help wanted' sign?
- "Help wanted" sign?
- ... --- ..., in Morse code
- Critical message that's a hint to the six longest entries in this puzzle
- Message from a sinking ship
- Sinking ship's signal
- Job announcement letters
- 'I need help!'
- USCG reception
- Maritime emergency letters
- 'Mayday!' precursor
- Desperate dots and dashes