On top of these reasons, the segmented and compartmented nature of ships tends to intensify and concentrate heat. The segments that can burn, will burn hotter, much hotter, especially if they can establish a direction of airflow.
Flashover is always a major concern, everything emits flammable gasses nowadays when heated to sufficient temperature, and ship fires absolutely reach sufficient temperature readily.
I highly encourage everyone to watch this video, this is not just important on this but it's really important to understand the rapidity of fire progression in general. It's worth a watch from the start but I'm going to link to the point where it gets colorful. Imagine this is all taking place in a steel blast furnace with locked bulkheads - it's literally a matter of 30 seconds between "my trash can fire is out of control" and "everything in the room is literally on fire".
Flashover is always a major concern, everything emits flammable gasses nowadays when heated to sufficient temperature, and ship fires absolutely reach sufficient temperature readily.
I highly encourage everyone to watch this video, this is not just important on this but it's really important to understand the rapidity of fire progression in general. It's worth a watch from the start but I'm going to link to the point where it gets colorful. Imagine this is all taking place in a steel blast furnace with locked bulkheads - it's literally a matter of 30 seconds between "my trash can fire is out of control" and "everything in the room is literally on fire".
https://youtu.be/BtMmymOxdjc?t=138