Bottom Scrubs, Hull & Running, Gear Inspections: Video & Still Pictures, Propeller Removals & Installation, Shaft & Rudder Zincs Replaced. MPI offers complete diving services for cleaning the bottom of your boat once a month in this warm Florida water. We can also change any prop, large or small, replace your zincs and clean out you’re A/C intake when it’s clogged. MPI also offers a unique underwater camera that allows you to see on the dock what the diver is seeing under water and communicate to the diver while he’s down examining the hull.