WHAT IS NEW?

Version 2.4.1.0

Fixed: A bad bug that gave erroneous wind direction in thermalling
       mode.
Modified: A landing destination selected with F4 is now added to
       destination queue.
Modified: Track cache display is terminated if any key is pressed.
Extended: Added computed speed mode to display IAS, and one to 
       display speed used in polars calculations. 
Extended: Added ability to use altitude corrected speed (IAS) in 
       glide ratio polars calculations.
Added:  A screen for information display (Alt-I) currently shows
       NMEA mode and wind information. This is apt to change in the 
	   future.
Added: Ability to draw arcs and circles of arbitrary radius on a map.

Version 2.4:

IMPORTANT:  Map file format change - read the gps_log.txt file and 
            read_upg.txt files. INI file parameter order changed.		  
Added: International Gliding Comission format for data logging.
Added: Ability to split help screen into two.
Added: Ability to enter destination using keyboard and save it 
        to file.
Added: Track cache for fast track recall
Expanded: More control over appearance of dots while displaying track 
        through ini file parameters.
Fixed: Some minor bugs related to switching time zone while program 
        was running.
Fixed: Inability of some track files to be displayed.
Changed: NMEA code switching using F6 moved to Alt-F6.
Eliminated: Good data can no longer be saved in raw format.

Version 2.3:

Added: Longitude and latitude can now be displayed with decimal 
		minutes rather than minutes:seconds (INI file setting). This
		is mostly for nautical maps.
Added: You can provide a fixed correction to the Latitude and 			
		longitude in the INI file. The EW and NS correction has to be
		entered in minutes and is added to the GPS datum. This is to
		correct for various map datums, and is intended as a local
		correction.
Expanded: Zoom mode of display. This allows you to temporarily zoom
		the map display to some predetermined resolution and then
		come back to the previous map display. Key [Alt-F10] toggles
		between the zoomed and unzoomed states. while you are in the
		zoomed states the track is still recorded to your original
		map view as long as the map does not need to be recentered.
		When you toggle the map state you automatically recenter the
		map. The zoomed state map span, expansion/contraction rate
		and map move margin are controlled by the INI file parameters
		and are independent of those for the main map. The map span
		is remembered while the program is running, but is not saved
		to file.
		
		There are two ways for using the zoom mode (INI file
		setting). If you chose to use the main map for zoom (set the
		parameter to 1) all the waypoints you drop while in the zoom
		mode are saved to the waypoint and map files. If you decide
		not to use the main map (set the parameter to 0) the
		waypoints you drop are saved only to the temporary map file
		and are lost when you exit the zoomed mode. If you use the 
		main map for zoom and your maps include symbosls which 
		display only at certain map expansion states you should set
		the initial zoomed map expansion state in the ini file to an
		appropriate value.
		
		If your version of the program supports computation of winds
		then the zoomed mode provides one more function. It assumes
		that you are circling, and after the first circle it starts
		looking for maximum and minimum speed in each circle. It
		interprets the difference as due to the wind. As you keep
		circling it averages the value of wind velocity derived from
		the minimum and maximum speed in each circle and displays it
		instead of the TOG: on the screen. pressing either Alt-W or
		Alt-H will result in saving the value for future computaions
		involving wind. To reset the wind averaging press Alt-B while
		in the zoomed mode.
		
		Under some conditions there may be too little memory to run
		in the zoom mode. If this mode is allowed you get a message
		"ZOOMED MODE allowed" in the opening screen which tells you
		which NMEA mode is used initially.	

Version 1.9.0.0:
  
Added: Support for Delorme's TRIPMATE GPS receiver.

Version 1.7.2.0:

Added: Multiple (3) destinations are now stored in memory and can be
       toggled in the destination display.
Added: Current altitude is displayed if valid and computed speed 
       display is not requested.
Fixed: Wind averaging in thermalling mode could get confused due to
       cyclical nature of angle measurement (i.e. 360=0)
Fixed: in some cases map centering could fail after centering on the
       average thermal circle.

Version 1.7.1.0:

Added: Attempt to center map on the average center of last circle
       in the thermalling mode.

Version 1.7.0.1:

Added: Units can now be toggled to give distance in nautical miles 
		and speed in knots.
Added: A Zoom mode of display. This allows you to temporarily zoom
		the graphic display to some predetermined resolution and then
		come back to the previous map display. This is primarily for 
		displaying track while thermalling. 
Added: GGA-VTG mode for receiving data. In this mode position, time, 
		and altitude come from GGA sentences while speed, and track
		information come from the VTG sentences. Some versions of
		Omnistar GPS systems require this.
Modified: Decoding VTG sentences now allows for a format where the
		magnetic track information is missing (just commas).

Version 1.6.3.0
Changed: Added minimum compute speed to the polars file format

Version 1.6.2.2
Fixed: Quotation marks are now included in empty spaces between commas
   for better compatibility with Lotus spreadsheet.

Version 1.6.2.1
Fixed: A divide by zero bug when computing needed altitude from polar 
   data at zero speed.
Fixed: cumulative shift of track vs. map with small arrow steps in the 
   view_map program.


Version 1.6.0.2
Added: Waypoint data file now supports floating point format for the    
   longitude and latitude (like the map file). This helps to transfer 
   "dropped" waypoints from map files.
Added: control over screen update frequency in graphic mode to limit 
   blinking.
Added: option for dropped waypoint behaviour not to replace
destination.
Added: control over the position cursor blinking rate.
Added: ability to replay track after scaling the map.
Fixed: Log files now are terminated with <CR><LF> (for Lotus)  
Fixed: an unlikely, but potential problem with a string overflow
   that could cause the computer to lock-up.
Fixed: potential problem with a memory fragmentation due to map moves
   that could cause the program to crash.
Many other small improvements.

Version 1.4.0.0
Added: Ability to supply local time offset
Added: Ability to save data every x acquisitions to minimize file size

Version 1.3.3.0
Added: Name of the last used waypoint file is saved in the ini file,
and 
   becomes the default next time you run the program

Version 1.3.2.0
Added: Ability to add comments to the log file (Alt-T)

Version 1.3.1.1

Fixed: The map move and map centering could fail to restore the map
Fixed: Save map now works again

Version 1.3.1.0

Fixed the winds aloft reporting to report winds "from" instead of "to"
Added: The program now suggest a file name for logging data of the
form
   YYMMDD-X.GPS (year month day - consecutive number) you can disable
   the
   suggestions in the INI file.
Added: Waypoint file format now allows for tagging waypoints as
landing 
   sites
Added: You can get nearest landing sites from the waypoint file for
   destination selection (distance, course and field elevation data
   are
   displayed during selection).
Added: Descriptive lines in the INI file (see the IMPORTANT.TXT file).
Added: You can enter your own wind estimate.
Added: Estimate of altitude needed to reach destination based on
distance,
   glider polar and wind (do not assume this is correct this is highly
   sensitive to wind errors and takes no account of vertical air
   motion
   and
   is only able to estimate the indicated airspeed).
Added: You can now change the waypoints file with Alt-F2.   
Added: "undocumented" feature for on the ground "what-if" testing
Alt-F1.
   A bit clumsy, but may be very instructive.
Changed: Hot keys got changed around F10->Alt-o, F9->Alt-M, F8->Alt+U, 
   F4->F8, F4 is now used for landing sites selection, and F9 to
   change
   the
   polar data or glide ratio. F10 is used for toggling wind correction
   for
   display of needed altitude on and off.

Version 1.2.1.0

Added rescaling of map display.
All messages are now checked for validity using checksum if one is 
   provided (only RMC was checked before). If there is no checksum 
   you have an option to check by message length.

Version 1.2.0.0

Added winds aloft computation from course or heading data.
Added the MPH,M pair to units
Added waypoint name editing
Added map file name sditing
Changes to the action of the first parameter in the INI file

Version 1.1.0.2

Map list is now sorted
You can choose not to log GPS data at all
You can choose not to log track nor speed data

Version 1.1.0.0
Added the geomagnetic model to compute magnetic deviation.

Version 1.0.1.2 

fixed RMC decode to allow Rockwell Microtracker sentences
fixed a bug that may prevent map move in certain parts of the world
added rudimentary INI file
allowed to vary the threshold for map move
allowed GPS input to set deviation

Version 1.0.1.1 

Added entry of magnetic deviation to override computation.

Fixed a bug in the RMC decode sequences that prevented proper
decoding from Garmin 55 and probably some other GPS units.

Fixed minor graphic display bugs.

Added ability of moving the map around in the View Map program by
using arrow keys (this only works for *.MAP files)