BoatU.S. is helping boaters improve their docking skills with an online game that offers a $25,000 grand prize as part of the organization's Wave of Fortune sweepstakes.

The DockIt! game gives players a choice of three boats to quickly and safely dock in a virtual marina slip, with progressively tougher docking scenarios. Hit a piling, run up on shoals or collide with another boat, and the game is over.

Those who make it into the slip improve their chances of winning the $25,000 grand prize as well as weekly and monthly prizes.

Every time a player completes one level of the game, they earn one entry into the BoatU.S. Wave of Fortune sweepstakes. The grand-prize winner will be drawn in December.

Click here to play the video game.