Like our modern day linemen (not football), who inspect the electric and communications on the road, I believe that at first we may have something like it on the planets we settle on. They be on top of the ground or underground. Coming to grips with dark places and things that bump in the night could become very pertinent to that worker. :o)
Created on my iPad with iBoxplorer with post work in Photoshop.
deviant art: bpclarke
Art Universe Oct 2013
Sci-Fi Oct 2013