more ships, page-75

to achieve stage 1 capacity they only need to ship every second day, thus 4 trains a day can keep up with the shipping demand.

the storage shed holds about 9 days supply so when a ship takes away 60,000t every second day, 4 trains a day refill it to maximum capacity in 2 days

to make up for lost time when necessary they will have to ship every day for several days from a 9 day supply buffer in the storage shed.

if for instance they need to ship every day for say 9 days they will have to increase the trains to run more often per day until the storage shed is refilled to maximum capacity.

the train unloader can unload 120,000t per day
the ship loader can load 120,000t per day