Crane: an often horizontal projection swinging about a vertical axis:
as a : a machine for raising, shifting, and lowering heavy weights by
means of a projecting swinging arm or with the hoisting apparatus
supported on an overhead track


So pretty much all overhead lifting mechanisms fall in the crane arena.
However, in any boat yard a travellift is known to be a very different
thing compared to a crane. Cranes are also used in boat yards and the
two are not to be confused. Bob Crantz is wrong as per the actual usage
of the term and calling a travellift a crane could be technically
correct, but in the real world it's dead wrong.

Now everyone be quiet!

RB
35s5
NY