Get a good sponge! Its not so easy with the boat being divided up into so many separate compartments! I have made the situation worse by adding several floors that divide the “bilges” even further. I am going to have an electric pump in the engine compartment, with a long hose that I can use to suck out each individual compartment. Also have a whale gusher…but I am hoping after all the work I have done on the bottom A87 wont leak!!