The 'Ship' option lets us ship wares from one Hideout to another, with the help of the Tiger Transport company, at a small fee. To see if any cargo or personnel is incoming at your Hideout, check the 'Transfers' under 'Logs'. The same is true if you're wondering if you bought something lately, or where are the recruits, received from a Workshop project. Also note that all equipment and crew onboard a craft transferred in-flight, will be transferred as well.