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« on: November 01, 2017, 06:03:00 pm »
Lee,
Thanks for your customary full and clear response.
Perhaps I'm being naive here and lacking any technical knowledge of avionics but if the objective is Electronic Conspicuity for the GA community (leaving aside the regulatory and implementation aspects for now), then it would seem that what is required is a device capable of interfacing with all existing standards. As far as I can see, PAW has all the required capability (mode A/C/S, ADS-B, FLARM etc.) with the exception of ADS-B out.
For example, an aircraft fitted with a mode S transponder with a GPS input (not PAW) for ADS-B out purposes could be "seen" by a PAW equipped aircraft but could not "see" the PAW equipped aircraft. In other words, the only 100% EC setup (currently) is between PAW equipped aircraft. I think it is unlikely that P3i will be adopted as a standard thus leaving ADS-B as the de facto standard.
Regarding cost, I don't know enough about what would be required (software only / hardware + software / if hardware is this more complex(costly) than the current PAW bridge?).
Currently PAW is a bargain but, as ever, there will be a threshold above which potential users will back off. In my personal opinion an increase of 50 - 100% in price would still put the device well inside the cost of any other (less capable) device on the market.
Do you have a feeling for the magnitude of cost to implement ADS-B out?