The Boat Problem is a classic problem in mathematics and computer science. It involves a boat with a LEAK, and the goal is to determine how to get all passengers from one side of a river to the other without the boat sinking. The solutions to this problem involve finding ways to plug the LEAK, such as using a bucket or a patch. The two crossword solutions for this problem are LEAKAGE (7 letters) and LEAK (4 letters). LEAKAGE refers to the water that is leaking out of the boat, while LEAK is the hole or crack in the boat that is causing the LEAKAGE.