BOTH INTERNATIONAL & INLAND You are approaching a bend in a river where, due to the bank, you cannot see around the other side. A vessel on the other side of the bend sounds one prolonged blast. You should __________.

Correct Answer: Option A — sound a prolonged blast

Under COLREG Rule 34(e) and Inland Rules, approaching a blind bend requires a prolonged blast to signal your presence to vessels on the opposite side. This alerts unseen traffic and establishes an audible warning to prevent close-quarters situations in restricted channel geometries.