This bloke in the pub told me this, so it must be true:
USS Enterprise: 'Canadian vessel bearing abc, this is US Navy, suggest you alter course to xyz'
Canadians: 'US Navy,suggest YOU alter YOUR course to yza'
Big E: "Canadian vessel, this is USS Enterprise - alter your course to xyz'
Canadians: 'USS Enterprise, alter YOUR course to yza'
Big E: 'CANADIAN VESSEL! THIS IS THE USS ENTERPRISE! THE BIGGEST, FASTEST AND MOST POWERFUL WARSHIP THE WORLD HAS EVER SEEN! ALTER YOUR COURSE TO XYZ IMMEDIATELY!'
Canadians: 'USS Enterprise. We're a lighthouse. Your call."
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S. Potter, Esq
"Gentlemen! You can't fight in here! This is the WAR ROOM!"