Naval situation.
From the bridge of the USS....... The watch sees lights dead ahead & notifies the skipper who hails who ever's ahead on the radio & says "this is the Heavy Cruiser the USS.... you are on a collision course with us so change course or well be forced to run you down, please reply ASAP". "This is the ........ Lighthouse, please alter course directly as we have no power to maneuver or prepare to run down a lighthouse".
Barry