This is a dock crane, based on real-word cranes.
The container can move up/down and forward/backward; but is not really perfect, movement need to be adjusted.
I' ve made this over a year ago, but i've never used. Try it, if you wont.
P.S. There are few custom textures not included in the .map file. Can be quickly replaced.
Rather cool. The few issues I had with the movement can be tweaked, but overall, nice job.