I saw this go by on another APRS mailing list (UI-View) back on 8/8/2008:
> Here are those common defaults:
> -0 Home Station, Home Station running IGate.
> -1 Digipeater, Home Station running a Relay Digi, Wx Digipeater
> -2 Digipeater [#2 or] on 70CM
> -3 Digipeater [#3]
> -4 HF to VHF Gateway
> -5 IGate (Not home station)
> -6 is for Operations via Satellite
> -7 Kenwood D7 HH
> -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)
> -12 Portable Units such as Laptops, Camp Sites etc.
> -13 Un-asigned
> -14 is for Truckers
> -15 is for HF
I've chosen -12 for my APRSISCE as it is definitely portable and may
someday actually go via RF. -10 seems more for non-mobile Internet
clients like WinLink and UI-View.
Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile
PS. I'm posting this here so I can quit trying to remember where it was
that I saw it before!