A damper for absorbing impact shock generated upon docking of a moving structure with a stationary structure or foundation is shown, the damper comprising a cylinder (1) connectable to the docking structure, the cylinder arranged with a cap end and a head end and having a piston (2) arranged movable in the cylinder and separating a cylinder cap volume (13) from a cylinder head volume (10). A check valve (14), a pressure relief valve (15) with adjustable opening pressure and an orifice (16; 23) of static size are respectively arranged in the cap end of the cylinder, wherein under constant load from the piston during a terminal stroke length of the damper in compression, the orifice provides a restricted flow from cylinder cap volume generating a constant pressure in the cylinder cap volume below the opening pressure of the pressure relief valve.