[OZAPRS] APRS SSID usage !!!

[Ray Wells]

Hi Scott,

I see your APRS beacons on the 40m.BBS frequency. I hope you're using 
the right SSID, hi.

Bob's recommendations are just that, recommendations, and nothing is set 
in concrete.

I firmly believe we should aim for a national standard, AS FAR AS IS 
PRACTICAL, but the evidence I've seen suggests that we have some miles 
to go to achieve that, and while ever multiple standards exist, users 
will be confused as to what is right or wrong.

Ray vk2tv


Scott & Clare Evans wrote:

>Hi All. this was taken from Bob's website. I think it explains it all!
>
>You can debate the usage as much as you like and essentially use what
ever
>you like!
>
>
>http://eng.usna.navy.mil/~bruninga/aprs/SSIDs.txt 
>
>APRS SSID Defaults                                             20 Feb
2004
>-------------------------------------------------------------------------
-
>
>Revised 2 June 2004 to add -10, -11 and -15
>
>Since there are 20,000 APRS users on the air, the APRS maps and data can
>get very cluttered.  Also, most operators have multiple stations on the
>air, such as their HOME, CAR, BOAT, and HT.  It is very convenient to be
>able to recognize these typical applications at a glance.  Here are those
>common defaults:
>
> -1, 2, 3, 4 are for digipeaters and other home stations
>
> -6  is for Operations via Satellite
> -7  is for TH-D7 walkie talkies
> -8  is for boats, sailboats and ships (maybe 802.11 in the future)
> -9  is for Mobiles
> -10 is for operation via The internet only
> -11 is for APRStouch-tone users  (and the occasional Balloons)
> -14 is for Truckers
> -15 is for HF
>
>Originally, in 1992, the first APRS GPS mobiles just transmitted raw
>NMEA-0183 GPS stings and so there was no way to insert a SYMBOL byte in 
>the pre-formatted NMEA 183 packet.  Hence we defined 14 common SYMBOLs as
>defaults to the 14 available SSID's that a mobile could use.  These 
>included BIKES, HELOCOPTERS, AIRCRAFT, VANS and many others in addition
>to the ones above.  This is now OBSOLETE.
>
>In the late 1990's we came up with a better solution and defined the
>AX.25 TOCALL of GPSxyz for such use.  In this case, the "xyz" characters
>can be used to define any of the hundreds of APRS symbols including
>Overlays.   Just look up the xyz in the SYMBOLS.TXT file included in all 
>copies of APRSdos (or these days, on the WEB).
>
>Since this GPSxyz concept was so powerful, it completely replaced the
>original SSID assignments and so those original NMEA defaults have been
>removed from the Documentation.
>
>However the convention for the 6 most useful ones remains and should be
>used in the absesnce of any other overriding conditions.  Except for the
>TH-D7 and Truckers, the other SSID conventions mark APRS "TYPES" of users
>that are independent of the many SYMBOLS they can use.  Thus it is nice
>to know HOW someone is getting into the system, whether via satellite,
>HF, the internet, or touchtone.  For example, using the -6 only for Space

>applications is so that the global APRS WEB data bases will keep 
>statistics and data for when you are operating through the satellites 
>separate from when you are working normally.
>
>So stick to the standards above for the obvious applications...  Of
course
>these are not rigid.  If you have more than 4 digipeaters, use any SSID
>you want.  These are only guidelines...
>
>de WB4APR, Bob
>
>73 de VK7HSE Scott Evans
>
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>
>  
>

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