"Please change your direction 15 degrees to the north to avoid a collision."
"Recommend you divert your course 15 degrees to south to avoid a collision."
"This is the Captain of a U.S. Navy ship. I say again. Divert your course."
"No. I say again. You divert your course."
"This is the aircraft carrier Enterprise. We are a large warship of the U.S. Navy. Divert your course now."
"This is a lighthouse. It's your call."