WELCOME NEW REGISTERED USER!   YOUR VALIDATION NUMBER IS: ___________________


1.  BE SURE TO USE PKUNZIP -d TO UNZIP APRS!
2.  Within the program hit F1 to select from a number of HELP screens
3.  Look at the index below of README files for detail on many APRS subjects
4.  All APRS commands are single KEY commands.  Some bring up additional menus
    on the bottom of the screen.  Only hit the first letter of a given command.

SUMMARY:  APRS can be summed up with two concepts, REAL-TIME PACKET TACTICAL
COMMUNICATIONS and MAPS.  Probably 98 % of APRS potential does not need GPS or
any tracking devices.  Think of APRS as just a multi-user distributed packet
network with a MAP display for many exciting amateur applications:

    Network topology monitoring         Direction Finding
    weather reporting                   DX cluster monitoring
    AMSAT ground station tracker        Satellite tracker (future)
    boat/mobile/RV tracker              Special event tracker/organizer
    Local area CHAT mode                HF DX plotter
    RF path estimating                  Search and Rescue
    Frequency Coordination database

Although APRS nets are springing up nation wide on the experimental two-meter
frequency of 145.79 MHz and on the HF frequency of 10.1515 LSB for vehicle
tracking and SKYwarn applications, there is no reason why APRS cannot be used
as a monitoring tool on any frequency.  If all NODES, BBS's, DIGI's and other
full time packet stations simply included their position in their beacons,
then any APRS user could see a network map of all assets on any frequency.
This is an excellent Frequency Coordination tool!

Each night when you secure, leave your APRS system on a different digital
frequency and see who you pick up!

DEMONSTRATIONS:  To get familiar with APRS, there are two important commands
for seeing past events.  First, you can load from a selection of BACKUP files
a snapshot of previous events.  These files are loaded using the FILES-LOAD
command and reload all the APRS pages at the time the file was saved.  Nothing
moves, but you can see all the APRS screens that show the position, status,
and latest packet from each station.  The more powerful demonstration tool of
APRS is the FILE-REPLAY feature which lets you replay the track history file
of a previous event.  All position reports are replayed to see station move-
ments on the map.  Many major APRS events are included on the distro disk.
You should replay them all and use the PgUP/DN keys and HOME key to zoom in
or out as the file is replayed.

DOCUMENTATION:  Since APRS is a generalized packet tool with application in
almost all facets of amateur radio, it is hard to write a simple description.
For this reason all of the documentation so far is separated into numerous
.TXT files, each focused on a particular subject.  These files can be read
ON-LINE using the F1(HELP)-FILES command.  All of these files are in the
README subdirectory:

FILENAME     DESCRIPTION
----------   ------------------------------------------------------------
README.1st   This file
README.now   Tells you how to unzip the APRS distribution disk
NEWNOTES.txt Tells of important changes in the latest versions

ALLABOUT.IT  General description and overview of APRS
AIRCRAFT.txt Using APRS from Aircraft and how to interface to ARNAV format
BBSNOTES.txt Suggestions to BBS SYSOPS on how to use APRS
CDROM.txt    Using MAPFIX to generate 64 mi maps from USGS 2,000,000 CD ROM
COMMERCL.txt COMMERCIAL APRS to interface with other DELORME/STREETS prgms
DF.txt       Information on DFing and AUTOMATIC Doppler interfaces!
DEMOS.txt    A quick summary of demonstrations and replays to impress you.
DIGIS.txt    Important info on using Digipeaters
DIGITIZR.txt Using DIGITIZERS to draw your own maps with MAPFIX.bas prgm!
PROTOCOL.txt Info on APRS formats so you can use DUMb terminals and TNCs
DX.txt       Info for DXcluster users on how to use APRS on a DX cluster
GPS.txt      Interfacing GPS or LORAN to APRS or stand-alone TNC's
HF.txt       Notes on the APRS HF tracking network
HELP.txt     Describes each of the APRS commands in detail
MAPS.txt     Detailed information on how to build your own maps
MARATHON.txt Lessons learned at the Marine Corps Marathon
MOBILE.txt   Notes on Mobile operations with GPS
OPS.txt      Suggestions on routine APRS operations
SPACE.txt    Suggested use of APRS for plotting satellite packet stationns
SYMBOLS.txt  A table of APRS symbols and the symbol designators
WX.txt       Info on using APRS for displaying weather information
BOATS.txt    Suggested use of APRS to support the WaterWay Net

IDEAS.txt    A file of other neat APRS ideas to encourage others to write
              supporting TNC and forwarding code.  Programmers READ IT!


SETUP:  You should customize APRS to automatically come up centered on your
favorite map screen by zooming the map to your center of activity.  Either
your home, or a WIDE area APRS digipeater.  Next set your desired digipeater
path using the UNPROTO command.  Finally, use the ALT-SETUP menu to SAVE your
config file.  You will be prompted for your validation number and then asked
for a CONFIG file extension.  Normally just select the default of APRS unless
you want to be able to invoke several different CONFIG files...  Once you
have saved a config file, APRS will always come up ready to go on your area.

Once you have zoomed into your neighborhood, non-registered users can use the
FILE-SAVE command to SAVE a backup file of their current situation.  When they
start up APRS, after logging on, they simply use FILE-LOAD to LOAD that backup
file to bring up the neighborhood map.  Then they move the cursor and place
themselves on the map in the right place.  Europeans, or non US hams may want
to change the default map from the initial USA map, to something closer to
home.   The initial map is determined by the default LAT/LONG and RANGE given
in the first three lines of the MAPLIST.APR file.  Without a config file, APRS
always starts up at this location and scale.  Obviously the locataion in Kansas
was chosen so that the whole US came up first.  As of version 5.9, you can
have many different MAPLIST.xxx files.

MAPS! - To see my best maps so far, zoom into Idaho Falls at 43 30N and 112
02W to the 1 mile range, or either Baltimore or NewOrleans to the 4 mile
scale.  By now (June 94) there are large area maps for most of the USA that
will get you down to the 32 or 64 mile VHF range in your area.  You can make
your own maps from the directions in MAPS.txt or I may be persuaded to do
custom maps for anywhere from $90 to $195 depending on complexity and my
wife's honey-do list.  It is really quite simple to draw a map.  Using just
a state Highway map, it should only take you an evening to enter all of the
interstate roads and the important four-lanes; and another evening if you
have to do a lot of detail coastlines or rivers.  Fortunately, everyone in
the state can use the results of your efforts!  I find that with just the
interstate highways and the important four-lane roads, you have a perfectly
useable map for most VHF packet operations.  You only need to draw more
detail maps for special events or applications. 

   Look for an APRS BBS in your state.  Already, Ohio Missouri and Calif have
developed dozens of local maps.  The biggest APRS states are CA,OH,FL,TX,MD,
AZ,VA,NJ,and NewEngland.  Thirty states have three or less users.  If you are
in one of these states, AND DONT HAVE A DECENT MAP OF YOUR AREA. Let me know!
If you like messing with APRS, you can now get one of the USGS $32 CD roms
and make your own STREET level maps.  See CDROM.txt.  There are more APRS maps
now than fit on the original APRS distribution disk.  See XTRAMAPS.txt.

APRS PROTOCOL:  APRS uses Unnumbered Information (UI) frames which are trans-
mitted without ACKS to avoid the problems, complexities and in-efficiencies of
a normal fully connected network.  To be a good APRS operator, you need to
understand DIGIPEATING and the use of the MY ALIAS and UNPROTO commands, since
you are responsible for your own best path within the network.  If you are
unfamiliar with these UI terms, consult your TNC user manual.  Although the
APRS documents speak frequently about BEACONS, it is important to note that
these are NOT the TNC BText beacons.  While APRS is on-line, it suppresses the
TNC BText and generates its own Status and Position reporting UI frames.

PACKET POSITIONS ON ALL FREQS:  Finally, encourage all BBS's, NODES, Servers,
and stations in your area, to place their LAT/LONG in their beacon text using
the format: BT !DDMM.xxN/DDDMM.xxW/....comments.  (For TheNET ID beacons, APRS
will accept this position format anywhere in the ID text.  APRS will also plot
the positions of stations reporting by Grid Square surrounded by brackets
[FM19xy].  If all packet assets get in that habit, then APRS will automatically
plot a map of packet activity on any frequency!  If stations will also put the
new Power/antenna/gain format in their BText, then effective communications
ranges can also be displayed!  See PROTOCOL.txt for formats.

STAND-ALONE-GPS-TRACKERS:  All PACCOM TNC's with version 3.2 firmware include
a GPS command that tells the TNC to accept GPS data (NMEA-0183 format) on the
serial port and place it in the TNC LOCATION TEXT.  Then the TNC will transmit
that Position at a rate set by the user!   Note that this is a dedicated
stand-alone application, and while the TNC is in this mode, it no longer
operates as a normal TNC for two-way communications.  But, this is
the simplest method to build a stand-alone-tracker.  If you are running the
APRS software mobile on a laptop, then see GPS.txt for ways to use ANY TNC
or ANY GPS while still operating on the air with APRS.

MORE READING:  For more info on APRS, see page 92 of July and page 11 of the
August 1993 QST and the Dec 1993 issue of CQ.  Also get the February 1994 issue
of QEX for the article on Interfacing GPS to packet.  More coverage was
provided in October 94 issue of 73 magazine under the topic of HOMING IN, and
a full page of pictures in DEC 94 issue of QST.  Look for more Jan 95 issue of
73.  Also see the front page of the May 1993 issue of the AMSAT journal (but
the registration information is incorrect there).

BBS ADDRESS:  My BBS address is WB4APR @ WB3V.MD.  I cannot respond to tons of
traffic, but will try to keep up...  Do feel free to send me any comments or
suggestions, but avoid any traffic in which I may have a pecuniary interest!
Hi Hi!  Look for a local APRS point of contact for your state.  Some states
have dedicated APRS phone line BBS's for distributing local APRS maps.  Ohio
is up to 40 maps as of June 94.

Other phone line BBS's known to carry APRS:

        CALIF    415 359-6985 Daly City
        OHIO     614 443-4249 Columbus
        FLORIDA  407 575-9680
        VIRGINIA 703 255-2172 Vienna
                 703 362-8673
        ARIZONA  602 938-7528
        INTERNET @ muncey.com ip 140.174.180.1 in Public\APRS
                   loggon as Guest or Anonymous with EMail addr as Pwd.
                 @ oak.oakland.edu in SIMTEL/PACKET/PUB/HAMRADIO
                   (Im not sure of the sequence of the above directories)

