The SC 5 is carried by SFr Mephisto.
FS1 Tech Room Description
We believe that the Shivans use cargo containers such as these as storage depots. We have yet to see a Shivan land on a planet. This leads us to believe that the Shivans plan on keeping all of their materials and resources in deep space.
FS2 Tech Room Description
The SC 5 class of Shivan cargo container is functionally identical to the SAC 3 class, as far as GTVA engineers have been able to determine. As with all Shivan cargo containers, standing orders are to capture at every opportunity, unless mission orders specifically dictate otherwise.