Joke-nothing to do we aviation, but still…

The USS Nimitz and several destroyers are cruising North on an excercise close to Canadian waters when the radio operator hears a distinctive Canadian voice saying,
“Unidentified vessels, this is Royal Canadian Coast Guard. Alter your course East to two two zero to avoid collision.”
Being head strong the US officer replies,
“Canadian operator, we are a US warship sailing in US waters. Reconmend YOU alter YOUR course to avoid collision.”
The Canadian repeats his first message with a certain degree of urgency. Annoyed at the Canadians attitude the officer replies,
“Sir, we are an American carrier, the most powerful vessel afloat!!! We have several destroyers off our stern armed to the teeth with…”
The Canadian interupts,
“Well this is a lighthouse, YOU CHOOSE!!!”