davidfox
Well-Known Member
Anyone had a problem with position data with the C80 plotter, i am getting GPS 1 minute and none the next, but i think the GPS is working
C80 No position data
- Thread starter davidfox
- Start date
oldgit
Well-Known Member
Just as a clue,my Raymarine plotter relied on a little dome aerial to provide the information it needed to sort a fix.The signal was OK,then intermittent and finally would not give one at all.It needed a new gps antenna and my old style one was of course obsolete and a new one just stupid money(£250).
Bought one of these and solved problem.
http://www.ebay.co.uk/itm/Marine-GP...tEquipment_Accessories_SM&hash=item19c1871825
It a common fault and is due to some non replaceable button cell inside unit crapping out.After attacking the old unit with weeny grinder located alleged battery and replaced it but still did not work.
Ps.Dead easy to fit comes with all instructions and basically involves connecting pos and neg plus one data wire or may two
Bought one of these and solved problem.
http://www.ebay.co.uk/itm/Marine-GP...tEquipment_Accessories_SM&hash=item19c1871825
It a common fault and is due to some non replaceable button cell inside unit crapping out.After attacking the old unit with weeny grinder located alleged battery and replaced it but still did not work.
Ps.Dead easy to fit comes with all instructions and basically involves connecting pos and neg plus one data wire or may two
Last edited:
eastlaked
Active Member
My C80 occasionally does that, however the SIMRAD GPS repeater fed from the same GPS unit also looses position at the same time, so I don't think its the C80. It only lasts a couple of seconds, so I am not too concerned. My GPS is located in the saloon head-lining so I expect the odd drop out.
David.
David.
rotrax
Well-Known Member
Lost it on mine too. Took it out of its Scanstrut console and went through the connectors. Found a loose one. Seems to have cured it-fingers crossed!
davidfox
Well-Known Member
Just as a clue,my Raymarine plotter relied on a little dome aerial to provide the information it needed to sort a fix.The signal was OK,then intermittent and finally would not give one at all.It needed a new gps antenna and my old style one was of course obsolete and a new one just stupid money(£250).
Bought one of these and solved problem.
http://www.ebay.co.uk/itm/Marine-GP...tEquipment_Accessories_SM&hash=item19c1871825
It a common fault and is due to some non replaceable button cell inside unit crapping out.After attacking the old unit with weeny grinder located alleged battery and replaced it but still did not work.
Ps.Dead easy to fit comes with all instructions and basically involves connecting pos and neg plus one data wire or may two
Would this work with the MARPA system on my radar I seem to remember you have to have a super duper Stabilized GPS or something?
jwilson
Well-Known Member
Just as a clue,my Raymarine plotter relied on a little dome aerial to provide the information it needed to sort a fix.The signal was OK,then intermittent and finally would not give one at all.It needed a new gps antenna and my old style one was of course obsolete and a new one just stupid money(£250).
Bought one of these and solved problem.
http://www.ebay.co.uk/itm/Marine-GP...tEquipment_Accessories_SM&hash=item19c1871825
It a common fault and is due to some non replaceable button cell inside unit crapping out.After attacking the old unit with weeny grinder located alleged battery and replaced it but still did not work.
Ps.Dead easy to fit comes with all instructions and basically involves connecting pos and neg plus one data wire or may two
I have had to replace the GPS mushroom on my C70 (same plotter with smaller screen than your c80). I used a Raymarine, but the Ebay one would probably also work.
The one thing that worries me about the Ebay advert is that it says the GPS has "Magnetic Declination Compensation" - which as far as I know has nothing whatsoever to do with a GPS receiver.
davidfox
Well-Known Member
I like the sound of that! - I have no idea what it is though!!
Pete7
Well-Known Member
I would follow Oldgits advice and replace the two watch batteries inside it first. You don't need a grinder to open them though, the screws are normally hidden by the labels on the underside. Once undone also remove the circuit board and the batteries will be on the other side.
Pete
Pete
davidfox
Well-Known Member
I need some help on this bought the cheapo one from ebay and i got the guy that does my electronics to fit as i am a bit of a numpty when it comes to things like that im afraid and this is the email i got back any ideas?
Problems I'm afraid.
First I mounted the antenna and ran the cable through to the switchboard
area
where (I thought) there are two ways of getting NMEA data into the
Raymarine
system: Using the NMEA/Seatalk adapter or using the NMEA port on the
autopilot
course computer. Whatever I tried, no GPS information appeared on the C80.
My next move was to buy an NMEA lead for the C80, run a cable from the
switchboard up to the C80 and inject the NMEA directly into the NMEA port
by
connecting to the new NMEA lead. This nearly works. Now all the GPS info.
is
displayed on the C80, for example, it was using 12 satellites, obtaining a
fix,
date and time etc but the C80 is not using this information. So even though
the
C80 is accepting the NMEA, showing a fix (position of the ship is
correct)in the
"display satellite information" window it is showing "No Fix" in the top
r.h.
corner of the main window and the ships' position is not correct. This
problem
has got to be plotter software.
I have had conversations with my usual supplier, Raymarine and the antenna
supplier but all are mystified. This is the info. from the antenna
supplier: Hi,
"We have sold many of these for the C80 with no issues for the past 6
years.
My guess is that there is a problem in the C80. Or it has unusual NMEA
sentences
loaded. Can you find out what it's running, eg GLL, GSA, GGA, GSV, RMC.
There is a CD in the box and test programme for the receiver.
You will need a pc / Laptop with a serial port, use com 1, no driver
needed.
Connect the receiver green and shield wire to the serial port via a db9
with
green and shield wire. Turn on the test prog, select com 1 and click on
OPEN
PORT. The data should stream through in the window below.
If the data shows up there as well then the fault will be in the C80"
My next move is to update the plotter software as I know the NMEA data is
streaming into the C80. I think there is a software discrepancy between
what is
being sent by the antenna and what the C80 is expecting. The antenna will
have
up to date NMEA sentences and the plotter may be expecting older version
formats.
The worst case is that I will have to fit a Raymarine Seatalk antenna after
all
and then the system should work, but meanwhile I will update the current
C80
software to the latest version.
Problems I'm afraid.
First I mounted the antenna and ran the cable through to the switchboard
area
where (I thought) there are two ways of getting NMEA data into the
Raymarine
system: Using the NMEA/Seatalk adapter or using the NMEA port on the
autopilot
course computer. Whatever I tried, no GPS information appeared on the C80.
My next move was to buy an NMEA lead for the C80, run a cable from the
switchboard up to the C80 and inject the NMEA directly into the NMEA port
by
connecting to the new NMEA lead. This nearly works. Now all the GPS info.
is
displayed on the C80, for example, it was using 12 satellites, obtaining a
fix,
date and time etc but the C80 is not using this information. So even though
the
C80 is accepting the NMEA, showing a fix (position of the ship is
correct)in the
"display satellite information" window it is showing "No Fix" in the top
r.h.
corner of the main window and the ships' position is not correct. This
problem
has got to be plotter software.
I have had conversations with my usual supplier, Raymarine and the antenna
supplier but all are mystified. This is the info. from the antenna
supplier: Hi,
"We have sold many of these for the C80 with no issues for the past 6
years.
My guess is that there is a problem in the C80. Or it has unusual NMEA
sentences
loaded. Can you find out what it's running, eg GLL, GSA, GGA, GSV, RMC.
There is a CD in the box and test programme for the receiver.
You will need a pc / Laptop with a serial port, use com 1, no driver
needed.
Connect the receiver green and shield wire to the serial port via a db9
with
green and shield wire. Turn on the test prog, select com 1 and click on
OPEN
PORT. The data should stream through in the window below.
If the data shows up there as well then the fault will be in the C80"
My next move is to update the plotter software as I know the NMEA data is
streaming into the C80. I think there is a software discrepancy between
what is
being sent by the antenna and what the C80 is expecting. The antenna will
have
up to date NMEA sentences and the plotter may be expecting older version
formats.
The worst case is that I will have to fit a Raymarine Seatalk antenna after
all
and then the system should work, but meanwhile I will update the current
C80
software to the latest version.
