At some stage, i.e, in some state of the container logistics system, a number of container ships are plying the waters between container terminals according to their shipping route, and a "remaining"...

At some stage, i.e, in some state of the container logistics system, a number of container ships are plying the waters between container terminals according to their shipping route, and a "remaining" number of container ships are docked in container terminals — also according to their shipping route. While in container terminals containers — so designated by their waybills — are being moved between container ships and container terminal pools: either unloaded or loaded.