If your boat was taking on water, and sinking, Sea Tow, the Coast Guard or other rescue organizations might deliver a dewatering pump to your boat. This might allow you to fix the leak and continue on your own power, or it may simply be a stop gap measure that buys time until the rescue agency can get all of your crew safely off the boat. In any event, knowing how to use such a pump will prove helpful. In an emergency, every second counts. Watch.