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

Correct Answer: Option D — five short and rapid blasts

Rule 17(a)(i) and Rule 34(d) authorize the stand-on vessel to sound the danger signal—five or more short and rapid blasts—when doubt exists regarding the give-way vessel's intentions or sufficiency of action taken to avert collision.