> How long does it take just to unload and load? If it is more than 8-10 hours, you start getting overlapped I/O. As to parallelization, I wonder how much of

> How long does it take just to unload and load? If it is more than 8-10 hours, you start getting overlapped I/O. As to parallelization, I wonder how much of the route is a single track. Parallel tracks could allow coming and going without interference. (then there are siding and crossover tracks, etc) I also wonder - do you have to unload EVERYTHING? maybe just the express cargo, while the rest of the ship waits. Or you could combine ship cargo and one ship could make the long trip, while others return back across the pacific.