[aprssig] TAC-5

[Geoff]

On the Internet yes - you will see everything that is picked up by an
IGate...  but unless you have a badly configured IGate locally it's not
going to appear on RF.  The majority of IGates here have filtering that will
only gate posits within a certain range or prefix (VKn*) to RF - so the
Tactical calls from the US will not make it to RF.

As the guys have mentioned, Tactical calls are intended for use on an RF
channel, not the Internet.

We do use tactical calls here in VK as well from time to time - WICEN has
used them, as in an activation event it's much easier to identify AMBUL-1 as
"Ambulance 1" than work out that VKnXYZ-1 is "Ambulance 1"  
It's just that here in 99% of the occasions that tactical calls are used,
there it no IGate in the network to inject them to the APRS-IS.

Geoff  VK2XJG




-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Andrew Rich
Sent: Wednesday, September 16, 2009 12:43 AM
To: TAPR APRS Mailing List
Subject: Re: [aprssig] TAC-5

But I have heard it, on APRS IS

That is how I saw it


----------------------------------------------------------
Andrew Rich
Airways Technical Officer Grade 4
Surveillance - RADAR ADS-B
Amateur Radio Callsign VK4TEC
email: vk4tec at tech-software.net
web: www.tech-software.net
----- Original Message ----- 
From: "Pete Loveall AE5PL Lists" <hamlists at ametx.com>
To: "TAPR APRS Mailing List" <aprssig at tapr.org>
Sent: Tuesday, September 15, 2009 10:34 PM
Subject: Re: [aprssig] TAC-5


> The key is the term "tactical".  These are primarily RF-centric, not 
> APRS-IS-centric.  If you use TAC-5 in Australia, it won't affect the local

> RF operations at the US event simply because the local station will 
> acknowledge locally generated messages (IGates should not gate your TAC-5 
> acknowledgement to RF since the local IGate has recently seen TAC-5 on 
> RF).  Don't try to make this too complex.  There is a purpose 
> (facilitating tactical communications) that these tactical station 
> identifications fulfill.  They are legal on RF in the country of their use

> because they also contain the station callsign in the payload.  They are 
> RF-centric which means users of tactical callsigns must understand that 
> world-wide messaging and APRS-IS database usage is not guaranteed to be 
> available due to potential duplication elsewhere.
>
> As for Serj's request that the servers magically determine what is a 
> tactical callsign or not, that is not going to happen in the 
> near-real-time environment of the APRS-IS server.  There are filter 
> programs that can be put on the client machine (APRSFilter for instance) 
> that provide additional filtering capabilities beyond what is available in

> the generic server-side filters.
>
> 73,
>
> Pete Loveall AE5PL
> pete at ae5pl dot net
>
>> -----Original Message-----
>> From: Andrew Rich
>> Sent: Tuesday, September 15, 2009 7:16 AM
>>
>> Yes but I can also use TAC-5
>> I can't use his callsign and he can't use mine.
>
> Yes, he can use your callsign.  It will make you mad, but as long as it is

> being injected directly to APRS-IS (not directly to RF), it is "legal" 
> albeit annoying.
>
>> TAC-5 is a free for all.
>>
>> Callsigns are unique.
>
> Not necessarily, see above.
>
>> What happens if I run TAC-5 in Australia.
>>
>> And you try and message him
>
> _______________________________________________
> aprssig mailing list
> aprssig at tapr.org
> https://www.tapr.org/cgi-bin/mailman/listinfo/aprssig


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