You are the captain of the proud Maid of the Mist, taking tourists to view Niagra Falls. Sounds easy? Well, to keep from being fired you need to keep your ship in ship shape, by avoiding rocks and logs in your way. Hit one, and your ship will slow, and you will risk falling behind. Hit too many and you’ll sink. Watch for the dreaded whirlpools which are sure to sink you.

http://www.dcemu.co.uk/vbulletin/showthread.php?t=78269