We seem to be moving right down the list...
As long as we are discussing lists, lets visit the things the NMB apparently considers as indications of a merged carrier (carrier means AIRLINE Billybob)
(1) published combined schedules or combined routes; - Yup got 'em
(2) standardized uniforms; - getting those
(3) common marketing, markings or insignia; - yup got that (btw. anyone seen the insignia with the Atlas guy holding up the circle "P")
(4) integrated essential operations such as scheduling or dispatching; - really got that
(5) centralized labor and personnel operations; - yup got that too!
(6) combined or common management, corporate officers, and board of directors; - I'm curious, does Polar have their own board of directors - NOPE!
(7) combined workforce; and, - got this one too!
(8) common or overlapping ownership. - and this one!
Sounds like a merged single carrier to me.