Vessel has a schedule. Has to arrive at a certain berth at a certain time and is expected to only stay there for a certain maximum number of hours because another vessel will be arriving to take its place. Especially if they're already running late, there will be a lot of pressure to keep that schedule and that can lead to doing things that are usually safe, right up until they aren't.
The history of transportation, hell, the history of Mankind, is full of examples.
Vessel has a schedule. Has to arrive at a certain berth at a certain time and is expected to only stay there for a certain maximum number of hours because another vessel will be arriving to take its place. Especially if they're already running late, there will be a lot of pressure to keep that schedule and that can lead to doing things that are usually safe, right up until they aren't.
The history of transportation, hell, the history of Mankind, is full of examples.