The twin-piston hydraulic gangway is an advanced system installed at the stern of vessels (especially yachts and cruising boats) that serves both as an access gangway and as a means of lifting the tender.
It is in fact a telescopic or tilting walkway, made of resistant materials such as stainless steel and teak, iroko or non-slip materials (fake teak) for grating walking.
It is equipped with two hydraulic pistons, connected to a control unit, which control its movements.
The two pistons work independently to raise and lower the walkway, adjust its inclination, extend it or retract it
Their length varies (approximately 2-4 metres) and their capacity can exceed 200-300kg depending on the model.
Control is via remote control and on-board control panel.
Advantages
Smooth and stable movement thanks to the two pistons
greater load capacity than simpler systems
multifunctional use (catwalk + lift)
greater safety and precision in movements
Disadvantages
higher cost
requires plumbing maintenance
requires space and well-planned installation