The number of slots a ship can have on the NMS is based on its size. The larger the ship, the more slots it can have.
For example, a small ship like a frigate can only hold two slots, while a large capital ship like an Admiral’s flagship can hold up to eight slots. .
Slot size is also based on the type of ship. Ships that are used for combat, such as frigates and destroyers, have smaller slots than ships that are used for exploration and colonization, such as cruisers and battleships.
So far, all ships that have been released for the NMS have had at least one slot. However, there are plans for future ships to have more slots.
The conclusion to this article is that the number of slots a ship can have on the NMS is based on its size and type of ship.
