Dick,
Do a search on 100.5 and you will find much bleating. A year or so back
The intent is great….the implementation is a disaster. Like some of the rude letters they send out to owners telling them that their SIL=0 broadcasts by their transponders may be correct, but they need top get it fixed before further flight or possibly face further action.
What moron wrote that? in the first instance what they are reporting is correct, they then say that it may well be correct, then they say fix it or else.
The place is a disgrace. If this was an isolated case of poor written communication, I would let it slide, but seriously these guys have lost the plot on so many fronts I have lost all hope in ever seeing improvement.
So what hope have you of getting sense on 100.5, and what is worse some avionics shops have some very weir interpretations of many things of late. And they are not always correct.
Good luck.