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Thanks Todd!

@Tundah - Thanks!

@Schins - Panoptix requires an Ethernet connection and I'm guessing Garmin didn't want to include that on their lower cost systems.

Thanks. I found this article which sheds some light on how the different models are configured: http://www.sonarwars.com/garmin-echomap-plus-review/

One thing in that article I don't understand...

I did more searching and it appears that the EchoMap 62cv includes lakes charts and a 4 pin transducer. The other models all use the 8 pin transducer. But still no idea how many pins the chart...

NMEA 0183 is an old standard, supported by a wide variety of hardware and software, and is easy to decypher and interface with. NMEA 2000 is a whole 'nother critter and, to be honest, I don't really...

On the Garmin website it says the transducer is 4 pins in the chart plotter description, but in the transducer specs it says it's 8 pins. Which is it? Or is it an 8 pin connect but only using 4...

@Todd - So, as far as NMEA 0183 transmit / receive is concerned, are the EchoMap Chirp and EchoMap Plus the same? On paper it appears they are.

NMEA 0183 is a serial communications standard and has been around for about as long as marine electronics have existed. It uses standard text "sentences", sent and received via a serial port (RS232...

Awesome Todd, thank you very much!

Here's a snippet from the ECHOMAP 40 series installation manual. According to this manual, the ECHOMAP 40 series transmits "SDDBT" and "SDDPT" sentences (depth and depth below the transducer). It...

I'm looking for a sonar that will send NMEA depth data out and receive NMEA GPS data in. I also want a unit that works with the 4pin CV20-TM transducer. According to the installation and user...

I forgot about GPSBabel, thanks. I also found this in one of the user manuals for the EchoMap series. I'm hoping the Striker (or Striker Plus) transmits SDDPT sentences like the EchoMap.
...

From what I've been able to find, Garmin is using some "standard" NMEA 0183 sentences and also some "proprietary" sentences that are similar to NMEA 0183. Since I'm writing my own application to...

Yes, Garmin tends to be rather tight-lipped about their technology, but I dug a bit deeper and found a list of NMEA sentences that the EchoMap Chirp series sends / receives. According to that...

Can anyone tell me more about the data that is shared via the "User Data Sharing" cable? From what I've found so far ( https://support.garmin.com/faqSearch/en-US/faq/content/ZZ5c7kg45I3hDoL4fhXFd9 )...

Thanks Brian. As soon as I'm able to confirm what AutoChart Live features are included with the Helix 10, I'm going to order one. I really need the auto chart and real-time side imaging mosaics for...

What's different about the "KVD" edition? From what I can tell the only difference is a red logo and red button?

The PS-31 is -SOLD-. Still have the GPSmap 741 if anyone is interested...

Photos of the PS-31 (the dark spot on the left side of the transducer is a reflection of my head).

Photos of the GPSmap 741

I can post more photos later this weekend...

I'm selling my new Garmin GPSmap 741 and PS-31 transducer. I hooked them up to a battery for a photo shoot for a magazine article I was writing. It's otherwise been unused and was never installed. ...

I've decided to sell my PS-31 and GPSmap 741. Never been installed. Used for maybe 2 or 3 hours to write a magazine article. Still in original boxes. Contact me if you're interested.

Thanks Larry. I'll check it tomorrow and post back if I got it to work.

@Troy - What model display is that?

@Larry - When I select "combo" screen the only options I have are navigation and Panoptix... unless there's a hidden setting somewhere to make video...