Garmin 3005C/3010 Plotter connection to new Raymarine Autopilot (P70S/EV-1/ACU-200)

caleroific

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I am posting the following to highlight a problem I had setting up the autopilot TRACK function when I installed a new Raymarine autopilot connected to a NMEA 0183 Garmin chartplotter. The problem has now been resolved, I think, but not without some issues on the way. All comments welcome.

Over the last two seasons my old Raymarine SP5000+ autopilot has given up the ghost so I decided to bite the bullet and replace it with a new Evolution autpilot comprising a P70S control head, EV-1 Sensor and ACU-200 control unit. In doing so I was able to retain my existing Linear drive.

My configuration pre conversion had a Garmin 3005C chartplotter connected directly via a NMEA 0183 connection to the ST5000+ control head. The system worked very well and the ST5000+ in TRACK mode would follow routes set up in the Garmin chartplotter. The only constraint was that the ST5000+ would only support 4 alphanumeric waypoint names e.g. A357. This was OK and over the last 10 years I have some 50 preprogrammed routes with some 450 waypoints set up in the Garmin chartplotter.

Installation of the new autopilot went well. The installation instructions were well documented and I was able to install the equipment over a few days. The biggest issue was determining where to locate the ACU-200 and wiring it into the existing configuration. The P70S replaced the ST5000+ head at the binnacle and the EV-1 was installed in the location freed up by the old fluxgate compass. I used my old Raymarine NMEA to Seatalk Converter (E85001) and installed a new Seatalk to SeatalkNG Converter (E22158) to connected my old and new environments.

Commissioning the equipment was extraordinarily easy! Following some simple dockside procedures a short trip to my local fuel stop and back, which involved a slow 360 degree rotation resulted in an automatic setup of Deviation. A minor correction to align the EV-1 heading completed the process. Seatalk WIND and SPEED data appeared on the P70S. The following weekend I completed a round trip up the Solent in moderate to rough sea state and the autopilot performed exceptionally well much better that the old ST5000+. The AUTO and WIND VANE functions both worked well.

However I could not get the TRACK function to work. When I activated a route in the Garmin plotter the Bearing to Waypoint (BTW) and Distance to Waypoint (DTW) were both displayed on the P70S control head but when I selected TRACK mode the unit responded with "No Navigation Data"

Following a number of discussions with Raymarine UK, my local Raymarine Dealer, on line dialogue with Raymarine Support and doing my own research I fixed the problem but not without some considerable time and cost to myself. The problem was solved as a result of one or more of the following:

  1. Software Update. I checked the software versions of my equipment and found that the EV-1 required an update. The release note for this update says "Corrects a "... No Navigation" fault error that can occur if entering Track mode from data via multiple 3rd party Navigators and improves the management of Waypoint numbers from non Raymarine Navigators. ..."
    The software update should be an easy process but took two weeks because I do not have a Raymarine MFD and my local Raymarine Repair Center was unable to apply the update. As a result I had to send the EV-1 to Raymarine UK to update. The upgrade was applied for free but it cost me £30 in postage and a 100 mile car journey to get it done.
  2. Removal of redundant equipment. The new autopilot is very sensitive to (a) multiple sources of data, e.g. two GPS data sources and (b) data loops, e.g. repeat and/or delay of the same data from source. When I reinstalled the updated EV-1 I disconnected an old RN300 plotter, which I use to monitor Seatalk data, from the Seatalk network and an Actisense NGW-1 gateway, which I hope to use to get fast heading data from the SeatalkNG network. Thus when I reset my P70S and recommissioned the autopilot I could be sure that the correct data sources were selected. There was a possibility that the P70S had not been selecting the STNG/Seatalk Converter for GPS and navigation data and had been incorrectly selecting the NGW-1.
  3. Magnetic Variation Settings. Raymarine Support said that neither of the above would solve the problem. They suggested that I do a factory reset and recommission the autopilot. During the process check the Magnetic Variation set up in the Garmin plotter and set up the Magnetic Variation in the P70S to be the same (in my case 3 degrees West). This may well have fixed the problem but if it did I have no idea why!

Following the recommission I took the boat for a trip round the harbour to "swing the compass" and test the autopilot. All worked fine including TRACK mode although the autopilot took some time to settle down. Initially it would vear dramatically to port as it approached a waypoint. It would appear that the autopilot learns the characteristics of your boat (possibly because the EV-1 is mounted to port of the center line on my boat) and eventually configures itself to make more gentle, appropriate manoeuvres.

This has left me with one final issue and that is that the new autopilot will only except 4 digit Waypoint identities and not my alphanumeric names mentioned above. Further research suggests that this is because of a conversion issue between NMEA0183/Seatalk and SeatalkNG which is based on NMEA2000. The conversion to NMEA2000 uses the numeric waypoint number to identify a waypoint. It would be nice to have this confirmed. It is not a major problem for me but is does mean changing all my 450 Waypiont names to comply.

For information my Raymarine software status is as follows:

P70S 3.07
EV1 2.18 (was 2.17)
ST1 STNG Converter 2.03
ACU200 2.23
 
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A very interesting post considering my frustration some years ago when trying to get my Raymarine A/P to follow tracks from my Garmin plotter via 0183. It took me quite a while to realise that it only read the first 4 characters of the waypoint name and therefore each point needed to have a unique name.
 
I have a similiar problem, albeit on older Raymarine products; Seatalk not Seatalk NG.
I have a Lowrance Plotter at the chart table which requires entry of waypoints by name. I have a ST60 Graphic display in the cockpit, the primary use for which is to show me distance to waypoint, bearing to waypoint SOG etc. I also have other ST60 instruments. The ST 60's and a Raymarine Smartpilot SP3 autopilot were bought 2nd hand in working order. Connecting the Graphic display to the chartplotter via NMEA0183 worked fine but "stuttered" ie it "lost the signal" from the chartplotter from time to time. In the first hour of sailing hardly at all, after that with increasing frequency, usually for a few seconds but sometimes for up to a minute. Obviously this was very irritating especially as you were never absolutely certain the signal would come back ( it always did though!

During the summer I got round to installing the Autpilot and in so doing I changed the wiring so that the Chartplotter NMEA output went to the Autopilot rather than the Graphic and the ST60 network was of course connected to the Autopilot "computer". Raymarine had told me this would work better as the autopilot computer is better at interpreting NMEA than the ST60 Graphic. This solved the stuttering problem - great.
BUT..... It meant that the Graphic would no longer display the waypoint name, instead it wanted a waypoint number, but the Lowrance plotter doesn't use numbers only names. This is better than the old "stuttering" problem, but it would re-assuring to have the waypoint name displayed in the cockpit.
I think what is happenning is that the plotter outputs the waypoint name, but the autopilot is unable to process it and pass it on as it were.

When I have time I am going to try to connect the second NMEA output from the plotter direct to the Graphic, Raymarine have told me this will just result in a data loop and wont work, but then they don't believe the Graphic ever displayed the waypoint name!
 
This has left me with one final issue and that is that the new autopilot will only except 4 digit Waypoint identities and not my alphanumeric names mentioned above. Further research suggests that this is because of a conversion issue between NMEA0183/Seatalk and SeatalkNG which is based on NMEA2000. The conversion to NMEA2000 uses the numeric waypoint number to identify a waypoint. It would be nice to have this confirmed. It is not a major problem for me but is does mean changing all my 450 Waypiont names to comply.

Actisense have the following response on their website:

https://actisense.desk.com/customer/portal/articles/2089974-using-the-ngw-1-with-waypoints

which confirms that this is a NMEA 0183 to NMEA 2000 translation constraint.
 
The following is an update on where I am now and what I did to get there.

It would appear that the TRACK function was not working and does not work as I thought.Later trials showed the SOG disappearing and the Autopilot dropping out.

To get the TRACK autopilot mode to work properly I had to route my Garmin GPS data directly from the Garmin GPS head to the SeatalkNG using an Actisense NGW-1 STNG converter. It appears that what I was doing which was to route the GPS signal from the Garmin GPS head via the 3005C/3010C plotter via the old Raymarine NMEA 0183/Seatalk1 converter and then via the Raymarine ST1/STNG converter was a step or two too far.

Thus I now send the GPS data directly from the GPS to the Autopilot. The Navigation data is still being sent from the Garmin 3005C/3010C plotter via the NMEA/ST1/STNG converters. (Installing a Raymarine STNG GPS would, I am sure, have had the same result.)

Following sea trials I have managed to get the autopilot TRACK mode to follow my routes set up in my Garmin plotter albeit the Waypoints still have to numeric.

As before I have had a few issues with the boat swerving off course as I approach a waypoint but have resolved this by further adjustments to the Autopilot Setup, e.g setting the unit to "Sailboat (slow turn)", source of boat speed to be "SOG" and Rudder Response to "Cruising". I have still some work to do here but progress has been made! If anybody has done anything similar on a 34ft yacht I would like to know what Autopilot Setup parameters you used.
 
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Very interesting, as I'm hoping to be installing the same autopilot, connecting to a Garmin 751. Thanks for the information

Pretty much irrelevant for your installation Larry, as the Garmin plotter supports N2K, so no need for the 0183 to N2K conversions. EV1 is SeatalkNG and EV2 is devicenet. How you proceed will depend upon whether you currently have a SeatalkNG network or N2K, or if neither, which you plan to fit (i'd go N2K).
 
EV1 is SeatalkNG and EV2 is devicenet.

According to Raymarine, the Devicenet port on the EV2 is only for connecting to certain steer-by-wire CAN systems. It's possible that it's actually more flexible, but I wouldn't assume so.

In any case, it comes with a STng cable so if you want to go with Devicenet wiring for the rest of the system (not unreasonable) then all you need is a field-installable Devicenet connector to replace one end of that cable.

Pete
 
Pretty much irrelevant for your installation Larry, as the Garmin plotter supports N2K, so no need for the 0183 to N2K conversions. EV1 is SeatalkNG and EV2 is devicenet. How you proceed will depend upon whether you currently have a SeatalkNG network or N2K, or if neither, which you plan to fit (i'd go N2K).


Yeah, I'm thinking the same. The only issue I have is legacy 0183 connections to SH VHF and Tacktick Instruments, but that can be dealt with probably by an Actisense Gateway (I don't have room in the cable duct to the plotter for N2K and 0183)
 
Yeah, I'm thinking the same. The only issue I have is legacy 0183 connections to SH VHF and Tacktick Instruments, but that can be dealt with probably by an Actisense Gateway (I don't have room in the cable duct to the plotter for N2K and 0183)

I think an N2K network for the plotter and autopilot makes good sense and may well come in handy in the future if you add anything or update existing 0183 equipment. If the legacy 0183 stuff only needs to talk to the plotter the 751 has two 0183 ports which can be connected using CAT5 cable, if there is room. If not enough room then the Actisense provides one sensible solution.

If going the Actisense route, is it worth looking into the Shipmodul Wifi multiplexor ? More expensive, but it will broadcast the NMEA data over Wifi, handy if you have a tablet or laptop onboard ?
 
Interesting post. I'll do the maths later on how the waypoint name is stored, but would be interested to know why you have so many routes and waypoints stored.

I hold two permanent waypoints, the mooring and the safe water mark for my home port in the plotter and only ever use routes during a voyage and then only to use the VMG function.
 
would be interested to know why you have so many routes and waypoints stored.

Some people like to do all their navigation by GPS "go-to" between predetermined waypoints. So much so that you can buy printed books containing nothing but lists of waypoint coordinates. I don't really understand this approach, but obviously people who do it will build up extensive libraries of recorded waypoints which are valuable to them.

Pete
 
I have all my regularly used routes and waypoints set into my plotter, primarily as a safeguard/double check for routine trips but also so that if I become incapacitated for any reason someone else on board who may have very little navigation experience can take over. Additionally I sometimes return to my mooring through rocky passages in pitch darkness which is only possible via gps with caution.
 
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Some people like to do all their navigation by GPS "go-to" between predetermined waypoints. So much so that you can buy printed books containing nothing but lists of waypoint coordinates. I don't really understand this approach, but obviously people who do it will build up extensive libraries of recorded waypoints which are valuable to them.

I have a whole set of waypoints built up for landfalls I make or hazards I have to go around. I'm surprised you describe that as being done by some people. What do others do, just stare at the chart plotter until the opposite shore or the rocks to be avoided come onto the screen?
 
I have a whole set of waypoints built up for landfalls I make or hazards I have to go around. I'm surprised you describe that as being done by some people. What do others do, just stare at the chart plotter until the opposite shore or the rocks to be avoided come onto the screen?

Same here, plus a load of fishing marks. I also have a route through the local harbour to the lock, important if the fog descends. I also keep routes for any long trips i've planned.
 
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