Cabins and holds

Extensions of certain ships, adds more storage space, but most importantly allows most machines to be built inside them.
The machines that can't be built have a special category.

Cabins

• Small ship cabin (Two can be built on a ferry, raker, galleon, soarer, and skimmer).
• Medium ship cabin (A single one built on a ferry, raker, galleon and skimmer).
• Large ship cabin (A single one built on a galleon and skimmer).

Holds

• Small cargo hold (A single one built on a soarer).
• Medium cargo hold (A single one built on a ferry and raker).
• Large cargo hold (A single one built on a galleon and skimmer).