BOTH INTERNATIONAL & INLAND You are the stand-on vessel in a crossing situation. Which signal should you sound if you think the give-way vessel is NOT taking sufficient action to avoid collision?

Correct Answer: Option B — Five short and rapid blasts

Rule 34(d) states that when vessels in sight of one another fail to understand the intentions of the other, or are in doubt whether sufficient action is being taken to avoid collision, the vessel in doubt shall immediately indicate such doubt by sounding at least five short and rapid blasts.