It doesn’t matter if you’re in a little kayak or a mega cruise ship, every vessel that floats will get some accumulating of water at the bottom of it, which needs to be removed. If you’re on a boat that doesn’t have a motor and/or a battery then it’d still be a good idea to get a manual bilge pump so you are able to clean out any water that comes in. This will ensure that you have something which can help you to get rid of that troublesome bilge water.