Youve seen the ones with busses going under low bridges, how about boats? :shock: http://www.jumpingpixels.com/shiphight.html
(http://deeker.com/Images/dumbass.jpg)
(http://www.pks.coventry.sch.uk/csg/iagree.gif)
It might be just as much the mistake of the bridge-staff as the captain, to be honest! Thats assuming its a bridge that can be raised...
When I was younger, this happened at the bridge that you took to see my granny:
http://en.wikipedia.org/wiki/Tj%C3%B6rn_bridge