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Old 29-06-2008, 04:54   #1
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VMG on Furuno GP7000

Hi

I am trying to work out how to get Velocity made good on my Furuno GP7000. I cannot find anything in the manual that explains what all of the codes stand for. Does any body know if any of these codes would equate to Velocity Made Good (to a waypoint)?

SOG,COG,STW,HDG,DST,BRG,TRIP,DEPTH,TEMP,HDOP,VDOP, XTE,DRF,SET,WST,WDT,WSA,WDA,DATE,TIME,TTG,ETA,DEST

Thanks

Sam
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Old 29-06-2008, 05:05   #2
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Not all devices support all sentences but:

WCV - Way point closure velocity

VTG - track made good

ZTG - UTC & Time to Destination Waypoint

here is a link to read about all of them:

http://vancouver-webpages.com/peter/nmeatype.txt
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Old 29-06-2008, 06:40   #3
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Near as I can guess Speed Over Ground (SOG) is what you're looking for. The others are (best guess?):
COG - course over ground,
STW -?,
HDG - heading,
DST - distance or daylight savings time,
BRG - bearing,
TRIP - trip distance,
DEPTH - depth,
TEMP - temperature,
HDOP - horizontal dilution of position,
VDOP - vertical " " ",
XTE - cross-track error,
DRF - drift?,
SET - set?,
WST,WDT,WSA,WDA - ? but maybe has something to do with waypoints,
DATE -date,
TIME -time,
TTG - time to go,
ETA - estimated time of arrival,
DEST - destination?
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Old 29-06-2008, 21:09   #4
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The WCV and RMB strings both include velocity to waypoint in knots ie includes for current, leeway, etc.

Your Furuno transmits both these sentences (as $GPWCV and $GPRMB).

John
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Old 29-06-2008, 22:13   #5
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On rereading your question it is perhaps not clear if you want to know how to display velocity to destination/waypoint or whether it is put on the NMEA bus for other displays to use (which as in my last post, it does do). On reflection I suspect you may want to work out how to display it.

If so, all I can suggest until someone who has one of the units in front of them comes along, is open up the Navigation Data Display window and go through the options to see what is displayed in the window each time, trying the most obvious ones first to see all the parameters that are displayed in that window choice (ETA, DEST perhaps, assuming the other parameters change as well in the window to give info related to the ETA or DEST, for example? The manual I have has a misprint in it so is not clear on that) but you've probably done that already .
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