The US Navy Atlantic Fleet is closing in on the North American shores. Suddenly a blip on the radar appears and the radio starts crackling:
"Hello please divert to 5°East to avoid collision. Thank you." The commander starts answering: "No you divert 5° West to avoid collision. Over!" "Sorry sir You are the one who should divert to 5°East! Over! "Listen to me you asshole! We are the USS Washington and we have an entire fleet at our disposal and be sure we'll use all means necessary to keep ourselves safe!" After a moment of silence, the radio crackled again: "In case you still haven't figured out, we can't move BECAUSE THIS IS A LIGHTHOUSE!"