- - There are nine in this puzzle, including a symbolic one
- - Messages contained in 18 Across 23 Across 55 Across and 62 Across
- - Hidden in this puzzle's theme answers
- - S O S and Mayday
- - Urgent help messages from ships or aircraft
- - Flares, e.g.
- - Attempts to get help
- - Flares at sea
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