GPS/Autopilot Hookup

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Dave Winiker

HELP!!! I've just returned from trying to hook up a Garmin 192C to the Raymarine ST4000+. Each works fine by itself but I keep getting a "NO DATA" message when the autopilot "TRACK" button is pushed. I've double checked the GPS setting (NMEA Port 1 4800 BAUD) and I've tried switching the blue GPS output lead to the autopilot NMEA input fitting but that didn't help. I'm at the point where I'm about to say "the heck with it". Before I give up and resort to transferring the GPS data "manually" I thought someone might have a clue as to what may be the problem. Dave Winiker, "Champagne on Ice"
 
S

Steve

NEMA Formats

Read the manual carefully (you probably already have). I just went through a similar problem with my Magellan GPS hook-up to my ST4000+. Look at the configuration screens for the NEMA message formats. Some of them are defaulted to a message format that is older than the autopilot. Don't give up; having the GPS talk to the autopilot is a big deal, especially if you operate in areas with strong currents -- the GPS will make your boat "crab" into the current so you maintain the correct course (not just the correct compass heading).
 
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Alchemist

It DOES Work

I have a Garmin GPSMap 162, and I got ot to talk to my ST-4000. I had the same problems that you are reporting, but overcame them after a call to Garmin. It's not obvious from the directions, but connect the following: The blue NMEA Out from the Garmin connects to the ST-4000 NMEA IN. The NMEA Out (-) from the ST-4000 is connected to the ST-4000 electrical ground (-). DO NOT connect the Garmin NMEA IN to anything. Until I made this second connection, I got the same results as you. Good luck Steve Alchemist
 
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Reudi Ross

nmea

the nmea formats on both the gps and the st4000 need to be set to the same format. I have a magellan meridian that talks to my st4000 mk2. it took a little fiddling with the formats, but it will work. The post about wiring is right on also.
 
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Alchemist

Read the post before you answer

The Garmin was configured to NMEA out: (I've double checked the GPS setting (NMEA Port 1 4800 BAUD)) and as far as the ST-4000 is concerned, anything connected to the NMEA connections is NMEA. The only thing that was missed in the orginal post was connecting the ST-4000 NMEA (-) to the ST-4000 electrical ground. Steve Alchemist
 
Jun 6, 2004
104
Pearson P422 Warwick, RI
Goodness ,,,

Alchemist - Are you having a bad day, or are you always rude? I was only trying to be helpful to Dave, not you. People often refer to the COM1 & 2 ports as NMEA ports. Dave was having a problem, and I think it was reasonable to suggest a double check of the protocol set on the menu. This forum has a reputation for polite discourse. Let's keep it that way.
 

Scup

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May 18, 2004
126
S2 27 Southern Lake Michigan
Maybe this will help...

Although my set up is a bit different, perhaps my experience will help a bit. The wiring is likely the similar if not identical. My objective was to interface a Garmin GPSMAP 76CS with a Raymarine Tillerpilot ST1000 Plus. Specifically, I wanted to power the GPS from the boat's 12 v. power supply, as well as drive the Raymarine tillerpilot through the Raymarine 6-pin socket. For future reference, here's the correct installation, which I gleaned from the responses above, and from the technical folks at Garmin (who put me on hold for 20 minutes.) Note: the interface information as written on page 50 of the Raymarine Tillerpilot Owner's Handbook will not work for this particular application. All wires refer to the Garmin Power/Data serial port cable with bare wires (round data port end inserts into the GPS): Red wire 12 v. to socket pin #1, Black wire ground to socket pin #2 AND spliced to socket pin #5 [NMEA (-)] This is the real trick of the installation. Brown wire (NMEA out) to pin #6 [NMEA (+)]. White wire is irrelevant for this application (can be left unconnected), but can also be lead to pin #5, which I did. On the GPS interface page, the GPS is set to NMEA In/NMEA Out, 4800 baud. Find a waypoint on the GPS, hit GO TO, press Auto on the tillerpilot, the press -10 & +10 simultaneously, wait for the response, then press -10 & +10 again to activate the tillerpilot tracking. Ta-Da!! That's how it works on my set-up. As they say, your mileage may vary.
 
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Terry

auto pilot

Like Dave S. stated, the 4000+ will show no data if a waypoint or route hasn't been selected on the gps. I recently connected my Garmin 182 to the 4000+, only nmea + and nmea - are needed between the two. The blue nmea+ from the gps will go to the 4000+ nmea + "in". The 4000+ nmea- "in" is jumpered to the black negative battery line for the 4000+. The attatched photo is the 192c connection cable, maybe it will be a little easier to understand. First select a waypoint or route on the gps. Press auto on the 4000+, then press track on 4000+, it should then display "Next Wpt". This means you are getting waypoint data from the gps. Press track again and the boat should turn to the selected waypoint or the first waypoint of a selected route. Sail On... Terry
 
Jul 17, 2005
586
Hunter 37.5 Bainbridge Island - West of Seattle
It works, but......

I got my Garmin-45 connected to my ST4000 autopilot about 8-10 years ago. It works, but you know what? It is just too much work to use it. Especially since it only works when we are under power, and is useless under sail. You also have to put all the waypoints into the GPS. Even when we are under power, one of us is always in the cockpit, and we always have to make minor heading adjustment anyway, like avoiding other boats, crabpots, deadheads, debris. For us, it is just easier to press the button on the autopilot's control head to turn it on/off, and use the GPS for reference.
 
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Gary

I agree

Yes, the GPS track to waypoint under sail doesn't sound like a good idea to me either, I haven't even tried it. I have my old Garmin 38 hooked to my ST4000Mk2. Works great as an NMEA to SeaTalk interface, when my knotmeter impeller sticks I can just put it on SOG. Gary
 
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Terry

Not for sailing

Absolutely, trying to sail to a waypoint with wind shifts etc. would be, well pointless. If the 4000+ was wanted for sailing, the auto wind feature would be the way to go. I would rather run the wheel myself, but I have found this feature works suprisingly well for a quick potty break etc. Sail On... Terry
 

Rick D

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Jun 14, 2008
7,184
Hunter Legend 40.5 Shoreline Marina Long Beach CA
Maybe for Sailing...

...I never used the track function for years, but have been doing so the past several on longer trips where drift can be an issue. With it on the helm, I do the sail trim. Works like a champ, unless the GPS dumps, and then it reverts to auto anyhow. At least it is supposed to, alto it did a 180 on me once. I think it was operator error since I may have started my track from a waypoint in back of me. I didn't think I did, but... Rick D.
 
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Dave Winiker

GPS/Autopilot Hookup

Many thanks gentlemen. After spending about 15 minutes on the phone with the Garmin tech rep (Matt) this afternoon. Armend with his and your helpful suggestions I'll give it another try in the morning. I believe my problem was not having a GPS waypoint/goto selection which I gather is needed for the AP to show data. Fortunately I've been using alligator clips to make my connections. If I still can't get the systems to talk to one another by noon tomorrow I'm going to call it quits as I'm going on a short sail on the schooner Virginia which is taking out a group of us construction volunteers. (See the attached photo - that's our H31 in the foreground abd the Viginia in the background. She's a beauty!
 
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