BOTH INTERNATIONAL & INLAND You are approaching another vessel on crossing courses. She is about one mile distant and is on your starboard bow. You believe she will cross ahead of you but she sounds a whistle signal of five short blasts. You should __________.

Correct Answer: Option C — make a large course change, and slow down if necessary

Five short blasts indicate the danger signal under Rule 34(d), meaning intent is not understood or safety is doubted. Proper seamanship requires making a large course change and reducing speed to regain safe separation.