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: - Entering or exiting a blind turn
- Nearing an obstructed area
- Leaving a dock or a berth
|
| 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 |