Slot Charterer = while an NVOCC may or may not have their own containers, a Slot Charterer almost always is an actual shipping line who. Master plans definitively document the positioning of containers on board. On ro/ro ships, the slots are usually organized along lanes running lengthwise. The ground slot will usually vary between approximately m2 per TEU depending on the container -handling and stacking equipment. The container.
No Man's Sky - Storage Containers - Guide
Container slots - Euro finanziell