Quite often these days the next port has specific windows for ships to be alongside, and if its missed then there could be hours or days waiting at anchor for a gap to come up. Can be especially annoying if a ship arrives after a vessel waiting because it missed its window, they get to berth first as they have a boon=king and on time. In NZ, deepsea vessels feeder cargo between ports quite freely, and this week one quite late and as the connecting vessel had to sail, the affected containers will be sitting at the terminal for two weeks waiting for the next opportunity. Cutting and running a necessary tool. Not helped by the "bigship" phenomenon which means only one option to most destinations per week, in the old days when lots of smaller ships on the route a delays may only have been a few days if the first opportunity missed.