Schedule THE NUMBER OF REPETITIONS OF THE AUDIBLE SIGNAL
| Purposes | Number of signals |
|---|---|
| “Distress” or “Help wanted” | ONE signal |
| (if no answer is given to a call, “Distress” is to be understood) | |
| Halt | TWO signals |
| Retire | THREE signals |
| Advance | FOUR signals |
| To call attention | FIVE signals |