Ship Command - Build
From PlanetsWiki
This tab of the Ship Command gives you acces to the dry dock some ship have, allowing them to build other ships in space. Note that using Quickbuild is a much better way to do this as it allows you to build fully equipped ships.
Moreover you have access to the ship plan data bank. You can view any of the ship hulls that your race can build and load any of the plans into the ship`s Hull Plan data bank as well as erase it or transfer it to another ship or a base.

