Mooring involves ( a ) beaching the boat, ( b ) drawing in the mooring point on the line ( where the marker buoy is located ), ( c ) attaching to the mooring line to the boat, and ( d ) then pulling the boat out and away from the beach so that it can be accessed at all tides.
42.
As Foster and Steve make it out safely by using Richie's escape route ( a jury-rigged ejection seat designed to launch them out and away from the ship ), their escape device has also been rigged to trigger an explosion, which finally causes the ship to blow up and sink and the electricity-based alien intelligence to be grounded into the seawater, fatally dispersing it.