Dunno if it's of interest, but WD 451 has an article called "Panoply of War" in it, which is billed as "A guide to aircraft markings and insignia in Aeronautica Imperialis, including a brief chart showing some of the Imperial Navy's unit structure."
The short version is that it's 3.5 pages, which contains:
- about half a page on the organisational structure of the Imperial Navy (flights, squadrons, wings, etc)
- 2 pages of colour plates on markings of the Imperial Navy (4 illustrations), specifically camouflage and ace markings.
Overall somewhat disappointing...
(I got my subscription copy today...)