INTERNATIONAL ONLY Two power-driven vessels are meeting. What would a two blast whistle signal by either vessel mean?

Correct Answer: Option A — "I am altering course to port"

Rule 34(a) specifies that two short blasts indicate a vessel is altering her course to port. In International waters, these signals are strictly rudder-action signals. They inform the other vessel of the maneuver being performed, rather than proposing a specific passing side or requesting permission for a maneuver.