BoatBanter.com - View Single Post - can garm,in map76s output compass data thru NMEA option?

wrote:

On Tue, 11 May 2004 06:26:34 -0700, "Danny" wrote:

You need a heading sensor which should have come with the RADAR PC. Your GPS
will only give you heading while under way.

His GPS has an internal compass and altimeter. It will give him a
heading while standing still. There are settings in the GPS to specify
when the compass takes over from the GPS for heading data. The
settings are stated as something such as, "compass enabled after
traveling below x miles per hour for x minutes (or x seconds)". He
wants to know if he can get the internal compass to output to his PC
along with the GPS data.

The GPS outputs the compass value in a separate sentence in the NMEA
messages. Note that the compass is only accurate while the unit is held
horizontally.

Dale

BB

"none" wrote in message
news
I am using the map76s as a spare gps for my nobeltec charting software on
my laptop BUT it doesn't 'seem' to be using nthe compass data exclusively.
When i turn the gps at a standstill the boat icon turns the same way but
the absolute value is way off...circa 30degrees. Normally when I am
moving the dynamic gps data keeps feeing me heading data but when i am
stopped the radar needs a heading to align the chart to the echos. [the
software is radarPC which is a chart with radar and gps data superimposed]

Is the a way to get the garmin to output that compass heading data or to
check and see if it actually is outputting but the software is not using
it?
thanks rick

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_ _ Dale DePriest
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