The lookout on a battleship spies a light ahead off the starboard bow. The captain tells him to signal the other vessel, “Advise you change course twenty degrees immediately!”
The answer comes back, “Advise you change course twenty degrees immediately!”
The captain is furious. He signals, “I am a captain. We are on a collision course. Alter your course twenty degrees now!”
The answer comes back, “I am a seaman second class, and I strongly urge you to alter your course twenty degrees.”
Now the captain is beside himself with rage. He signals, “I am a battleship!”
The answer comes back, “I am a lighthouse.”
There is a youtube video of this joke:
http://www.youtube.com/watch?v=j5onkl2EHV4
-Kevin