I have connected the nmea output from the chartplotter to the nmea input of
my gps.

Am I correct in thinking that I should be able to upload waypoints that are
created on my geonav 8 chart plotter to a garmin gps128.

Presently I dont see any....
I know that the connections/speed settings are o.k, because the plotter see
the data from the gps.




Also am I correct in thinking that the autopilot must be driven from the
nmea output from the gps rather that the plotter nmea out.

You need to change the GPS setup to garmin/garmin.

--
Remove "nospam" from return address.
"garry crothers" wrote in message
...
I have connected the nmea output from the chartplotter to the nmea input
of
my gps.

Am I correct in thinking that I should be able to upload waypoints that
are
created on my geonav 8 chart plotter to a garmin gps128.

Presently I dont see any....
I know that the connections/speed settings are o.k, because the plotter
see
the data from the gps.




Also am I correct in thinking that the autopilot must be driven from the
nmea output from the gps rather that the plotter nmea out.

On page 44 of the manual posted on:
http://www.garmin.com/manuals/82.pdf
Notice there IS an I/O format NONE/NMEA, etc., which puts the Garmin
in Transmit GPS data ONLY mode, and it will not listen to anything.
I'm not sure this Garmin will accept waypoints from an NMEA device.
Look on this page 44 and you'll see a reference to GRMN/GRMN
proprietary BS interface to other proprietary Garmin instruments
SHARING WAYPOINT data. Notice how it says NOTHING about getting
waypoints from anyplace else. This may be an indication it doesn't
listen to waypoint statements from your plotter in NMEA/NMEA mode.
They don't read all the statements and on the bottom of page 59 is the
LIMITED statements it produces, which may not be of use to some
instruments looking for different statements. Most all of them,
however read GPRMB and/or GPRMC statements.

This unit may not talk to your NMEA transmitting plotter for waypoint
input. Looks from the text like it only accepts waypoints from
GARMIN's proprietary data streams.

On page 48 of the manual, you'll also want to be SURE the Garmin is
set to the same Map Datum the plotter is using or you could be way off
somewhere on the chart.
Same is true for the mag heading reference on page 49.

Don'tcha just love being on a boat with 5 DIFFERENT, INCOMPATIBLE,
proprietarydammit interfaces, none of which can talk to anything else
of use? Remember Betamax?

Let's dump it all and tell the manufacturers we'll ONLY BUY PRODUCTS
WITH USB INTERFACES from now on......STANDARDIZED!



On Sat, 16 Aug 2003 18:53:02 +0100, "garry crothers"
wrote:

I have connected the nmea output from the chartplotter to the nmea input of
my gps.

Am I correct in thinking that I should be able to upload waypoints that are
created on my geonav 8 chart plotter to a garmin gps128.

Presently I dont see any....
I know that the connections/speed settings are o.k, because the plotter see
the data from the gps.




Also am I correct in thinking that the autopilot must be driven from the
nmea output from the gps rather that the plotter nmea out.



Larry

Extremely intelligent life must exist in the universe.
You can tell because they never tried to contact us.

"Glen Wiley Wilson" wrote in message
...
Larry's deductions are correct. In NMEA mode, your Garmin is deaf. In
RTCM
it can hear differential GPS beacon data. In GRMN mode, it can upload and
download waypoints, routes, etc, but it can't communicate with normal NMEA
equipment.

But on the garmin faqs page it says it can be done, and I remember using
this with a yeoman plotter

http://www.garmin.com/support/faqs/faq.jsp?faq=27

The autopilot can be driven from either the GPS or the plotter; whichever
one
has the waypoint is the one that generates the steering commands.

But if I cannot upload waypoints to the gps, then I would be better getting
the plotter to drive the autopilot, with perhaps a changeover switch in case
the plotter failed.



Glen Wilson
See my NMEA Instrument Repeater software
at http://www.worldwidewiley.com/3NMEA.shtml

Looks pretty neat ... are you going to release this as shareware, open
source or what ??


garry

On Sun, 17 Aug 2003 11:43:54 +0100, "garry crothers"
wrote:


But if I cannot upload waypoints to the gps, then I would be better getting
the plotter to drive the autopilot, with perhaps a changeover switch in case
the plotter failed.

There ya go! That's the best way to do it. I'm installing a rotary
switch on my buddy's ketch. It will feed the autopilot from either
the chart plotter in the Raymarine SL-72C radar/WAAS-GPS/gyro
...or....the Garmin 185 GPS...or....the Dell notebook computer running
The Cap'n software...or....The yeoman glued upside down to the bottom
of the chart table......at the flip of the switch in case its heavy
weather. Unless the autopilot fails, we're probably gonna have
steering...(c;


Larry

Extremely intelligent life must exist in the universe.
You can tell because they never tried to contact us.

On Sun, 17 Aug 2003 11:33:41 +0100, "garry crothers"
wrote:

Let's dump it all and tell the manufacturers we'll ONLY BUY PRODUCTS
WITH USB INTERFACES from now on......STANDARDIZED!

Sounds good to me, you lead the way and I'll follow

We'll do it as soon as we can figure out how to get boaters to pay
$100 for a USB cable at West Marine that Best Buy sells for $8.....


Larry

Extremely intelligent life must exist in the universe.
You can tell because they never tried to contact us.

That's very cool. My program can switch between the charting program on the PC
and the GPS as the steering command source. If the PC dies, I have to unplug
the GPS from the PC serial port and plug it into the serial port on my B&B NMEA
interface. Not quite as slick. Although some might consider your rotary switch
a single point of failure?

Glen


On Sun, 17 Aug 2003 13:18:58 GMT, (Larry) tempted fate with:

On Sun, 17 Aug 2003 11:43:54 +0100, "garry crothers"
wrote:


But if I cannot upload waypoints to the gps, then I would be better getting
the plotter to drive the autopilot, with perhaps a changeover switch in case
the plotter failed.

There ya go! That's the best way to do it. I'm installing a rotary
switch on my buddy's ketch. It will feed the autopilot from either
the chart plotter in the Raymarine SL-72C radar/WAAS-GPS/gyro
..or....the Garmin 185 GPS...or....the Dell notebook computer running
The Cap'n software...or....The yeoman glued upside down to the bottom
of the chart table......at the flip of the switch in case its heavy
weather. Unless the autopilot fails, we're probably gonna have
steering...(c;


Larry

Extremely intelligent life must exist in the universe.
You can tell because they never tried to contact us.

Glen "Wiley" Wilson usenet1 at worldwidewiley dot com

On Sun, 17 Aug 2003 18:37:50 GMT, "Glen Wiley Wilson"
wrote:

That's very cool. My program can switch between the charting program on the PC
and the GPS as the steering command source. If the PC dies, I have to unplug
the GPS from the PC serial port and plug it into the serial port on my B&B NMEA
interface. Not quite as slick. Although some might consider your rotary switch
a single point of failure?

Glen

The switches I use are sealed rotary switches from www.mouser.com
designed to be washed down in a factory environment. The only part
that's exposed is the solder terminals which means nothing once the
wires are soldered to them behind the panels. I don't use open
switches in any marine application.



Larry W4CSC

Maybe we could get the power grid fixed if every politician
regulating the power companies wasn't on their payrolls.