A CRADLE FOR LIFTING AND LAUNCHING A SMALL WATERCRAFT ON AN EXPOSED MARINE LANDING SITE

摘要

A watercraft lift with a landing cradle (10) for landing and launching a small watercraft (40) on a generally rigid fish cage or wharf/pier (30). The watercraft lift comprises at least one davit arm (20) pivotable in the vertical plane, comprising at least one set of an overlying and an underlying parallel enlongate davit arm joint (21a, 21b), in which the davit arm joints (21a, 21b) are supported in bearings at their inner ends in an inner, upper horizontal axle bearing (31a) and an inner lower horizontal axle bearing (31b), respectively, on a generally vertical beam (36) attached to the hull of the fish cage (30), and in which the davit arm joints (21a, 21b) are supported in bearings at their outer ends in an outer, upper horizontal axle bearing (14a) and an outer lower, horizontal axle bearing (14b), respectively, on the landing cradle (10). The landing cradle (10) may have buoyancy properties. Further, the watercraft lift comprises a control device (65) for a motorized elevator device (60) arranged for elevating and lowering the landing cradle (10) between an outstreched position under the sea surface for landing/launching of the small watercraft (40) at or above the deck (34) of the fish cage (30), and so that the landing cradle (10) retains the boat in a generally upright position between the sea and deck level; and in which the elevator device (60) is arranged to be released so that the landing cradle (10) with the small watercraft (40) can heave in a free position in the sea before elevation.