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[aprssig] N1547C Aeronautical Mobile

Phil Reed preed at dnaco.net
Wed Oct 19 20:55:10 UTC 2005


N0YXV - Stan Coleman wrote:
>>
>>
>>
>>Andrew Rich wrote:
>>
>>>My 2cents worthe
>>
>>Comments intermixed.
>>
>>
>>>If this sort of traffic leaks to another country, how are they to 
>>>treat an aeronautical callsign on a ham system ?
>>
>>Depends. How do they handle it now? Ham signals don't stop at 
>>the border.
> 
> 
> Not all countries use the same frequency.
> 

If I'm in my country, transmitting properly according to my country's
amateur radio rules, then the other country's rules are not my primary
concern.

>>
>>>I am all for it, just use a ham callsign as the source, and use the 
>>>comment field "N1547C" in the comments
>>>
>>
>>Why? The TNC could be transmitting the ham callsign in morse 
>>tones every 9.5 minutes; that form of ID would never be 
>>picked up by listening TNCs or the APRS infrastructure, yet 
>>it would still be perfectly legal according to the FCC rules. 
>>There is no requirement that the ID must be in the From: 
>>field of the APRS packet.
> 
> 
> If you use the Morse code approach in an area where the system is
> already flooded with packets you might get some irate people. Your right
> the APRS network wouldn't see the Morse code but it could block APRS
> packets from getting through.

No worse than transmitting an AX.25 beacon every 9.5 minutes with a
station ID -- no other APRS packet would get through during that time
either. A 20 WPM Morse burst with a callsign would be no longer in
duration than the beacon packet.


-- 
                                 ...phil / W8SCA

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