My first time to Broome by cruise ship will be next year, but from what I gather docking large vessels there is currently limited by the tidal range.
"The existing Port of Broome consists of a fixed jetty that is at the mercy of some of Australia’s biggest tides, reaching off the coast into a sea that can rise and fall by 10 metres in just six hours. This has presented challenges when loading and unloading vessels, particularly for live cattle exports to Indonesia, gas rig tenders for the Browse Basin, and cruise ship passengers wanting to visit the historic pearling town."