On a dark and foggy night, the captain saw a light dead ahead on a collision course with his ship.
The captain had his signalman send: “Change your course ten degrees east.”
The light signaled back: “Change yours, ten degrees west.”
Angry, the captain had the signalman send: “I’m a Navy captain! Change your course, sir!”
“I’m a seaman, second class,” came the reply. “Change your course, sir.”
Now the captain is furious: “I’m a battleship! I’m not changing course!”
The seaman sent one final reply: “I’m a lighthouse. Your call.”