You're Gonna Need A Bigger Spanner ...

This morning, one of the big tour boats that ply the waters here during the summer pulled up alongside the marina dock next door to us, and had its enormous engine hoisted out with a large crane.  I imagine these engines take a beating every year, and need regular TLC to keep them humming along.  I wonder how the now engine-less boat will make its way back to its own berth?