(Also see: First Order and Third Order)
Ratings system channels and Companions/Donors related to their capacity and sensitivity.
For channels the ratings relate to their selyn Draw Speed and Secondary Selyn Storage System Capacity.
Donors have ratings similar to channels and relate to their selyn production rate and selyn draw speed tolerance. Donor, Technical Class: TN1 - TN2 – TN3 or First Order - Second Order - Third Order