Tim,

I understand your reluctance to implement this feature if it's simply due to the added clutter it creates. In the UK however, ASRs are still with us, and they, along with listening squawk regions and Flight Information Regions sure would be nice to cross-reference in SD from time to time; ideally by the same way in which primary airspace layers are currently user-configurable: ON if you need them, OFF to declutter, when you're familiar with a route or region.

I did my first multi-FIR / ASR x-country flight using SD as my primary chart a few days ago. As an experienced bizjet pilot who's recently returned to recreational VFR flying, I must say that depiction of the mentioned regions in SD would greatly improve my confidence in knowing where along my route I ought to consider changing FIR frequencies and altimeter settings. It would also save me the time of otherwise cross-referencing my planned track on SD with two otherwise disparate pdf documents detailing ASRs/FIRs and Listening Squawks areas of coverage. Additionally, I believe having surety in that level of detail translates into pilots sounding generally more confident and competent on the radio - and that's of benefit to everyone.

Equally, I'd be interested to hear 'best practise' from other pilots using SD as to how they stay ahead of the game in planning the next Info frequency, Listening Squawk or ASR setting along a given route.

Hamish