I don't know for sure, but since it's the clerical unit, I'm guessing it's an asset visibility /inventory management function they do, monitoring what's loaded and unloaded at the dock. With bar codes, scanners and computers, it's a job just as easily done from Mumbai as it is from an air conditioned office at the dock that the worker never leaves.
That’s why this union fought the introduction of barcodes in the first place. I remember the stories on FR from the early 2000’s.