A method for aligning a truck chassis with a required position relative to
a crane, in which the truck is scanned by a sensor means. The laser
scanner is located on the crane in such a way that it will be able to
scan at least one of a plurality of loading/unloading lanes. The truck is
scanned when it enters into one of the loading/unloading lanes in order
to detect/identify at least one edge of the truck. The distance between
the identified edge of the truck and a fixed point on the crane is
measured. A signal is generated that enables a truck driver to drive the
truck into a required position in the loading/unloading lane for
accurately receiving or delivering a container.