Rules of the Road · Maneuvering & Warning Signals
You are the stand-on vessel in a crossing situation. The give-way vessel appears to be taking no action. You sound five or more short blasts. What are you signaling under Rule 34(d)?
- AThat you are altering course to starboard
- BThat you are operating astern propulsion
- CThat you are in doubt whether sufficient action is being taken to avoid collision✓ Correct
- DThat you are engaging in restricted maneuverability
Explanation
Five or more short and rapid blasts is the doubt or danger signal of Rule 34(d). As the stand-on vessel, you use this when in doubt that the give-way vessel is taking sufficient action. The signal can be supplemented by at least five flashes. It does not authorize you to take any particular action — it is a warning, not a maneuver signal.
Authority: 72 COLREGS Rule 34(d)
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