Append to the rule “Spaceships”:

Additionally, each Captain has one section on the wiki page entitled “The Hangar” to track aspects of their Ship. The heading of every section in the Hangar consists of a Captain’s name followed by a colon and one word, the latter being the name of the Ship.

Enact a new rule entitled “Modules”:

Each Ship may have Modules Installed in it, tracked in The Hangar. Every Module has a name, a Size, Assembly Instructions, and zero or more Effects. A Captain can, as a daily action, Install a Module into their Ship by following the Assembly Instructions of the Module if their Ship’s Class is not “-”. A Captain cannot Install a Module into their Ship if doing so would make [the sum of the Sizes of all Modules Installed on their Ship] greater than [their Ship’s Hold]. Whenever a Ship’s Class changes, all of the Modules Installed on the Ship are lost. A Captain can Activate any Module installed on their Ship to perform one of its Effects by following the procedure specified in the Effect description.