LAY RAMP FOR AN UNDERWATER-PIPELINE LAYING VESSEL, LAY RAMP ACTUATING METHOD, AND LAYING VESSEL COMPRISING SUCH A LAY RAMP

摘要

A lay ramp for an underwater-pipeline laying vessel has an inside ramp (9) hinged to the laying vessel (1); an outside ramp (10) hinged to the inside ramp (9); and an actuating device (11) having a first actuating assembly for rotating the inside ramp (9) with respect to the laying vessel (1), and a second actuating assembly (13) secured to the outside ramp (10) and to the first actuating assembly (12) to rotate the outside ramp (10) with respect to the inside ramp (9).