Sounding Off - When and How to Use Sound Signals
When two power-driven vessels encounter each other within one half mile, sound signals must be used. The initiating vessel indicates a maneuver, and the responding vessel agrees or disagrees.
| SOUND SIGNALS: | |
|---|---|
| 1 short blast (1 second) | I want to pass you on my port side (Hint: PORT = 1 syllable = 1 short blast) |
| 2 short blasts | I want to pass you on my starboard side (Hint: STARBOARD = 2 syllables = 2 short blasts) |
| 3 short blasts | Engine is in reverse |
| 5 short blasts | Danger, or do not understand approaching boat's intentions |
| 1 prolonged blast (4-6 seconds) | Warning:
|
| 1 prolonged blast every 2 minutes | Power-driven vessel operating in low or restricted visibility |
| 1 prolonged blast + 2 short blasts every 2 minutes | Sailing vessel operating in low or restricted visibility |
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