System for enabling embarkation and disembarkation of a vessel, which system comprises - a first access, more particularly an access platform or corresponding, which can be fastened to an entrance of a vessel or which leads to an access platform connecting to the vessel; - a second access, more particularly a terminal platform or terminal tower or corresponding; - adjusting means (180, 181) for adjusting the distance of the first access from the second access, wherein the adjusting means (180, 181) comprises a drive means arranged for setting or adjusting the height of the first access, and - an elevator comprising - a first and a second exit, of which at least the first exit is fastened to or is the first access and the second exit is connected to the terminal; - between the first and second exit in the vertical direction, a movable platform, which is most preferably a part of the elevator car; - drive means for displacing the platform in the vertical direction; - a speed reference unit for controlling the drive means for displacing the platform in the vertical direction such that the moving speed of the platform can be decelerated at the point of a first deceleration point from the nominal speed of the platform via an initial smoothing curve for deceleration to a maximum value of deceleration, and after this at the point of a second deceleration point by reducing the deceleration via a final smoothing curve to zero, characterized in that the speed reference unit of the system is configured to displace at least one of a first and a second deceleration point (P5, P7) when the distance of the first exit from the second exit changes, and wherein the speed reference unit is configured to displace at least one of a first and a second deceleration point (P5, P7) on the basis of at least one item of the run data of the drive means arranged for setting or adjusting the height of the first access. - a first access, more particularly an access platform or corresponding, which can be fastened to an entrance of a vessel or which leads to an access platform connecting to the vessel; - a second access, more particularly a terminal platform or terminal tower or corresponding; - adjusting means (180, 181) for adjusting the distance of the first access from the second access, wherein the adjusting means (180, 181) comprises a drive means arranged for setting or adjusting the height of the first access, and - an elevator comprising - a first and a second exit, of which at least the first exit is fastened to or is the first access and the second exit is connected to the terminal; - between the first and second exit in the vertical direction, a movable platform, which is most preferably a part of the elevator car; - drive means for displacing the platform in the vertical direction; - a speed reference unit for controlling the drive means for displacing the platform in the vertical direction such that the moving speed of the platform can be decelerated at the point of a first deceleration point from the nominal speed of the platform via an initial smoothing curve for deceleration to a maximum value of deceleration, and after this at the point of a second deceleration point by reducing the deceleration via a final smoothing curve to zero,