Sure, as long as you have an even number of ships in your fleet and they can be paired off to carry the same number of containers. It's certainly solvable but

Sure, as long as you have an even number of ships in your fleet and they can be paired off to carry the same number of containers. It's certainly solvable but adds a whole new level of logistical planning to make sure there is a suitable ship available and empty to receive the containers at the other end.