Portable boat lifts are intended to be used on land, rather than near, in, or on the water.
Sometimes referred to as a boat hoist, this equipment holds the waterfcraft out of the water so that maintenance and repairs can be performed.
A portable boat lift is different from a gantry crane, fork lift with elongated forks, or machine, none of which can be easily transported from location to location.
It is not specifically designed for separating a boat from a trailer.
This article related to water transport is a stub.