SD 3.6.2.19250 on Samsung S3 smart phone
Yesterday I flew from southern England to near Cambridge and forgot to make a note of the Farnborough North LARS frequency.
No problem as, in-flight, I selected the PLOG and got the frequency from the displayed list.
On the return flight I needed to check the frequency again, but the Farnborough North LARS frequency was no longer displayed in the PLOG.
Very strange as it was the same route and all I had done for the return flight was to select "reverse track".
Tony Nowak

In order to reproduce this issue we will need the details of your route, please? Assuming you can reproduce it yourself?

No problem.
Popham - Reading - Wing disused airfield - Main Hall Farm (just south of Huntingdon/Wyton).

I can send you my route file if that will help.
Tony Nowak

Thanks. This is the effect of the "Eliminate Redundant Radio Frequencies" PLOG option, which you have set to on. It's designed for the UK where there are often loads of intersecting LARS services. Essentially on your return journey if SkyDemon sees you're already within the coverage of another LARS unit you're likely to be using, for the whole duration of the period you're within Farnborough North's coverage, it eliminates the latter from the list.

I had forgotten about that setting but assumed it was to get rid of duplicate entries in the log? Or am I misinterpreting how this works?
For example, outbound, the log gave both F'boro LARS W and N information.  I would be in F'boro LARS W coverage area first and then transferring to the F'boro LARS N coverage area.
On my return it would be the other way round - F'boro LARS N coverage area first and then F'boro LARS W.
Or are you saying the log information gets changed due to another LARS provider in the destination area (Main Hall Farm)?

Thanks
Tony

It'll be another LARS provider in whose coverage you are for the duration of your time spent in Farnborough North's coverage. Since you are in the former provider's coverage first, SkyDemon gets rid of Farnborough North. Turn off the option and you'll see it, but you'll also see a lot more UK LARS providers that you probably don't want to see.

Thanks for the explanation.

Tony