propably not true, but funny
 

Canadians: Please divert your course 15 degrees to the South to
avoid collision.

Americans: Recommend you divert your course 15 degrees to the
North to avoid a collision.

Canadians: Negative. You will have to divert your course 15
degrees to the South to avoid a collision.

Americans: This is the Captain of a US Navy ship. I say again,
divert YOUR course.

Canadians: No, I say again, you divert YOUR course.

Americans: THIS IS THE AIRCRAFT CARRIER USS LINCOLN, THE SECOND
LARGEST SHIP IN THE UNITED STATES' ATLANTIC FLEET. WE ARE
ACCOMPANIED BY THREE DESTROYERS, THREE CRUISERS AND NUMEROUS
SUPPORT VESSELS. I DEMAND THAT YOU CHANGE YOUR COURSE 15 DEGREES
NORTH--I SAY AGAIN, THAT'S ONE FIVE DEGREES NORTH--OR
COUNTER-MEASURES WILL BE UNDERTAKEN TO ENSURE THE SAFETY OF THIS SHIP.

Canadians: This is a lighthouse. Your call.