Have you ever noticed the odd duck the subsidized Liner? J3 and unstreamlined. As a commercial vessel it is optimized for systems with high ports.

I figured that A and B ports have high ports and half or so C ports also have one as well ( consider pop score and Tl and geographic location). D port might have the off refueling station if they in the right chain.

This chain of thought started when I was pondering a route map through the corridor sector.

Evyn