There's one thing that I don't understand ..

Why DO you NEED a waterpump when the boat should stay floating by DESIGN?

Do you people take real battles on the water that causes any dammage?

If you need the pump to save the boat from going under, why not using a big balloon that expand with a simple valve controlled by you micro? So your vesel isn't lost.

A cheap CO2 capsule can do the trick!

have fun.