Keeping the Bilge Dry - And No Seawater Smell on My Sailboat!

My newer boat normally would have a dry bilge (in theory) since it has a deck stepped mast and no known water entry points into the boat. But that's the theory. In practice water comes in and also when doing raw water plumbing work. How do I keep the water out of the bilge? In this project I install a small pump to supplement the bilge pump. This covers the area not reachable by the bilge pump. Pump used in Video https://amzn.to/3MbBOpy