I Have sent this to Garmin today:

About 12 days ago, on Feb-19 I have sent a report to this support
group regarding a serious problem with the GpsMap 276C, related to
NMEA being stopped every day between 00:00 GMT and 00:08 GMT, but as I
do have not received ANY response from Garmin, I am re-stating the
problem. This problem was detected by a friend on his GpsMap 172C and
tested and reproduced in several 276C here.



Follow the report already sent 12 days befo



a)The 276C was sending NMEA messages normally until 20:59:59 LCL
(23:59:59 GMT) after that, it begin to send invalid NMEA messages,
and little time after, stopped sending anything.



b)Around 21:08:33 LCL (00:08:33 GMT) the 276C started to send NMEA
messages normally.



Sample:



$GPVTG,192.2,T,215.2,M,0.0,N,0.0,K,A*2F

$GPXTE,A,A,0.04,L,N,A*07

$GPAPB,A,A,0.04,L,N,V,V,8.6,M,BA01,1.4,M,1.4,M,A*5 E

================ 23:59:59 GMT

$GPRMC,000002,V,,,,,,,,,,N*51

$GPRMB,V,,,,,,,,,,,,,N*52

$GPRMC,000158,V,,,,,,,,,,N*5F

$GPRMB,V,,,,,,,,,,,,,N*52

============== 00:08:33 GMT

$GPRMC,000833,A,1248.705,S,03827.579,W,0.0,192.2,1 90207,23.0,W,A*32

$GPRMB,A,0.04,L,AIC,BA01,1248.413,S,03827.698,W,0. 315,338.3,,V,A*3B



Considerations:



1) The problem happens Every Day at that time on every place around
the world but we don’t know if happens at another time.

2) It is comproved in garmins 172C and 276C. We dont know what other
models have this problem.

3) I repute this problem as a very high risk if people does not know
about it. Many mariners like me and the majority of my friends have
Garmin Gps units interfaced with Autopilots specially when sailing
tricky routes, in narrow channels, in bad weather or at night.

4) This problem turns the interface inoperable (Raymarine autopilots
says "No Data" and ring the bell..) but nobody, including me, knowed
what was the cause of this behaviour until now.



I ask for a response ASAP from this support group..



Thanks



Pascal



01/03/2007

"Pascal" wrote in message
ups.com...
I Have sent this to Garmin today:

About 12 days ago, on Feb-19 I have sent a report to this support
group regarding a serious problem with the GpsMap 276C, related to
NMEA being stopped every day between 00:00 GMT and 00:08 GMT, but as I
do have not received ANY response from Garmin, I am re-stating the
problem. This problem was detected by a friend on his GpsMap 172C and
tested and reproduced in several 276C here.



Follow the report already sent 12 days befo



a)The 276C was sending NMEA messages normally until 20:59:59 LCL
(23:59:59 GMT) after that, it begin to send invalid NMEA messages,
and little time after, stopped sending anything.



b)Around 21:08:33 LCL (00:08:33 GMT) the 276C started to send NMEA
messages normally.



Sample:



$GPVTG,192.2,T,215.2,M,0.0,N,0.0,K,A*2F

$GPXTE,A,A,0.04,L,N,A*07

$GPAPB,A,A,0.04,L,N,V,V,8.6,M,BA01,1.4,M,1.4,M,A*5 E

?================ 23:59:59 GMT

$GPRMC,000002,V,,,,,,,,,,N*51

$GPRMB,V,,,,,,,,,,,,,N*52

$GPRMC,000158,V,,,,,,,,,,N*5F

$GPRMB,V,,,,,,,,,,,,,N*52

?============== 00:08:33 GMT

$GPRMC,000833,A,1248.705,S,03827.579,W,0.0,192.2,1 90207,23.0,W,A*32

$GPRMB,A,0.04,L,AIC,BA01,1248.413,S,03827.698,W,0. 315,338.3,,V,A*3B



Considerations:



1) The problem happens Every Day at that time on every place around
the world but we don't know if happens at another time.

2) It is comproved in garmins 172C and 276C. We dont know what other
models have this problem.

3) I repute this problem as a very high risk if people does not know
about it. Many mariners like me and the majority of my friends have
Garmin Gps units interfaced with Autopilots specially when sailing
tricky routes, in narrow channels, in bad weather or at night.

4) This problem turns the interface inoperable (Raymarine autopilots
says "No Data" and ring the bell..) but nobody, including me, knowed
what was the cause of this behaviour until now.



I ask for a response ASAP from this support group..



Thanks



Pascal



01/03/2007

Thank you very much for posting this. It's the kind of little glitch that
could kill a boat. It's also an excellent illustration of why you should
have a secondary source of situational awareness always engaged.

Would you or someone else please post a description of a way, if there is
one, to get a computer to read and record the NEMA sentences as you did? I
would like to try this with my 76Cx. If many of us start bombarding Garmin
with similar results, they are more likely to do something.

--
Roger Long

On Mar 2, 7:00 am, "Roger Long" wrote:
Thank you very much for posting this. It's the kind of little glitch that
could kill a boat. It's also an excellent illustration of why you should
have a secondary source of situational awareness always engaged.

Would you or someone else please post a description of a way, if there is
one, to get a computer to read and record the NEMA sentences as you did? I
would like to try this with my 76Cx. If many of us start bombarding Garmin
with similar results, they are more likely to do something.

--
Roger Long

Hi Roger, If you'd like me to I'll email you a Hyper Terminal file
that reads the output of NEMA data form your GPS into the serial port
of your computer. It only holds 500 lines in the buffer so thats only
about 8 minutes of data but you can "capture text" from the screen for
as long as you would like as far as I know. I didn't test it.

"Ken Heaton, Cape Breton Island, Nova Scotia" wrote in
message ps.com...
On Mar 2, 7:00 am, "Roger Long" wrote:
Thank you very much for posting this. It's the kind of little glitch
that
could kill a boat. It's also an excellent illustration of why you should
have a secondary source of situational awareness always engaged.

Would you or someone else please post a description of a way, if there is
one, to get a computer to read and record the NEMA sentences as you did?
I
would like to try this with my 76Cx. If many of us start bombarding
Garmin
with similar results, they are more likely to do something.

--
Roger Long

Hi Roger, If you'd like me to I'll email you a Hyper Terminal file
that reads the output of NEMA data form your GPS into the serial port
of your computer. It only holds 500 lines in the buffer so thats only
about 8 minutes of data but you can "capture text" from the screen for
as long as you would like as far as I know. I didn't test it.

Thanks, I would appreciate that.

Sorry for the blank reply. I've sent out several this morning. The laptop
I was using at home has developed a super sensitve touch pad.

Is this a program you wrote or is it in the public domain? If so, is there
a link where others could get it? I would post it on my web site because
lots of us are sitting around snowbound and it would be interesting for
several people to investigate the data drop out.

I've never used Hyperterminal and forgotten what it is so any use pointers
you could include would be appreciated.

The spooky thing about this bug for those of us on the US east coast is that
the problem would pop up in the evening when it's dark, we're tired and
sunburned, and most likely to be making our way up a channel to anchor
somewhere.

--
Roger Long

On Mar 2, 9:00 am, "Roger Long" wrote:
Thanks, I would appreciate that.

Sorry for the blank reply. I've sent out several this morning. The laptop
I was using at home has developed a super sensitve touch pad.

Is this a program you wrote or is it in the public domain? If so, is there
a link where others could get it? I would post it on my web site because
lots of us are sitting around snowbound and it would be interesting for
several people to investigate the data drop out.

I've never used Hyperterminal and forgotten what it is so any use pointers
you could include would be appreciated.

The spooky thing about this bug for those of us on the US east coast is that
the problem would pop up in the evening when it's dark, we're tired and
sunburned, and most likely to be making our way up a channel to anchor
somewhere.

--
Roger Long

Hi Roger, I've just emailed you the four files (one for each possible
com port). I'm posting this here in case you don't get them. Let me
know if they work for you.

Todat I have received a response from Garmin as below:

Thank You for contacting Garmin Product Support! I will be glad to
help you with this.
Our engineers are currently looking into this issue. We are currently
looking into adding this fix in a further update. However, at this
time we do not have an exact date of when this update will be out for
download. Thanks for the further information regarding this
information.





Best Regards,