Telescopic gangway, a motion compensated gangway and a vessel

A telescopic gangway, comprising a main gangway part and a telescoping gangway part that is telescopable with respect to the main gangway in a longitudinal direction to adjust a longitudinal length of the telescopic gangway, the gangway being arranged for transporting persons and/or loads, wherein the gangway is provided with a hoisting mechanism, comprising a hoisting winch mounted to the main gangway part or to another structure that is mainly stationary along the longitudinal direction with respect to the main gangway part, a hoisting sheave mounted to the telescoping gangway part, and a hoisting wire running from the hoisting winch to the hoisting sheave, the hoisting wire having a wire end portion suspending from the hoisting sheave downwardly, the hoisting mechanism further comprising a telescoping decoupling mechanism for compensating a variation of the wire end portion length caused by a telescoping movement of the telescoping gangway, wherein the telescoping decoupling mechanism comprises a main sheave mounted to the main gangway part, a sheave assembly that is located between the hoisting winch and the main sheave and that is freely movable along the longitudinal direction, the sheave assembly having a proximal sheave and a distal sheave, wherein the hoisting wire is routed from the winch to the main sheave, from the main sheave towards the distal sheave, and from the distal sheave to the hoisting sheave, and wherein the telescoping decoupling mechanism further comprises an additional wire running from a first fixation point on the main gangway part or on another part that is mainly stationary along the longitudinal direction with respect to the main gangway part towards the proximal sheave, and from the proximal sheave to a second fixation point on the telescoping gangway part, the first fixation point and the second fixation point being proximal relative to the sheave assembly.