Garmin GMI 20 & GHC 20, back on top?

Ben Ellison

Ben Ellison

Panbo editor, publisher & chief bottlewasher from 4/2005 until 8/2018, and now pleased to have Ben Stein as a very able publisher, webmaster, and editing colleague. Please don't regard him as an "expert"; he's getting quite old and thinks that "fadiddling fumble-putz" is a more accurate description.

10 Responses

  1. MadScientist says:

    When this and one supposes , a new Garmin Nexus range are added together it will catapult them way up the scale as far as instruments go.

  2. Ben Ellison Ben Ellison says:

    Thanks for bringing up Nexus! The new GMI 20 ads that Garmin is running in sailing magazines makes quite a big deal of how “Garmin and Nexus Sail Together.” The body copy reads as follows:
    “Two highly respected names on the water, Garmin and Nexus, have joined together to bring you a complete line of fully integrated sailing products keenly designed for racing and cruising yachts. Such as our new GMI™ 20 marine instrument display with
    highly visible color screen and low power draw. Count on this crew to make your sailing experience safer, more enjoyable, and more rewarding.”
    The Garmin media guy I asked didn’t know exactly what that means and as far as I know there are no new Nexus products (yet). But whereas Nexus apparently squeezed a lot of utility out the NMEA 0183 protocol, that may well explain why that 0183 port is on the back of the GMI and GHC 20. Perhaps Garmin even built in special Nexus management and calibration software?

  3. Paul says:

    Finally, an upgrade for the GMI 10. Well done. But the B&G Triton sure looked fine on display the other day. It will be interesting to compare the two.
    If Garmin is serious re: the sail market, they need a new wind sensor. Not a chance I’m using the current (non detachable) GWS 10 on top of my mast. The Navico 508 is looking good for that so far.

  4. Dennis says:

    It does look fairly oldish, the hardware (frame and buttons) and the screen design (fonts? colors?). I was hoping for a sleeker design. And it doesn’t have any AIS functionality. Sorry, why was this better than the GMI 10? Ah ok, the green on black night view…

  5. Jon says:

    In looking at the above photos I note the countdown timer aimed at the racing sailor. Having recently bought a Raymarine e7D I was surprised to discover that while it does have a countdown timer as described in the marketing materials, I – and Raymarine phone support – have not been able figure out how to put the timer onto a screen on the e7D. Maybe you or one of your readers has a suggestion. These are exciting times for marine electronics but as always there seems to be a gulf between the promise and what actually works.

  6. Brian says:

    One new feature I will use regularly is the auto-scroll.
    This will provide a rolling series of displays which
    as a practical matter gets the data of a larger screen to you without having to reach for a control.
    It seems kind of obvious for every small display to have this capability.

  7. Dan Corcoran (b393capt) says:

    1) I really like the green, its very eye pleasing. Why has everyone standardized on red? Was there a reason? Does the red preserve night vision better? Will green do just as well if the intensity is turned down vs a brighter red?
    2) Ideas of things to test for:
    – Support beyond the standard PGN’s for long established Maretron sensor PGN’s, especially battery and tank monitoring (Any reason all the displays don’t yet support the full range of Maretron and other sensor providers PGN’s. After all, the sensor providers are vital participants to the NMEA-2000 ecosystem, and the sensors I just mentioned have been around a long time)
    – Support beyond the standard PGN’s used in all boats, to information special for sailboats? Heal angle, target boat speed, etc? Support multiple speed thru water sensors, e.g. choose the leeward sensor when pairs of speed or depth sensors are used together on port & starboard?
    – Test for display harmony. Can displays be organized into groups? Will manually dimming one display in a group, dim the others? Can you dim the displays easily without jumping into menu’s? How about auto dimming? Will manually choosing other settings, such as choosing magnetic vs. true north, change across all displays (not just groups)? Will changing settings in the chart plotter work across the displays also? Can you set a depth alarm in one display, and when it alarms, clear the alarm from any nearby display? Will an anchor alarm sound on all displays?

  8. norse says:

    “red or green for night vision?” turns out to be a fascinating question.
    are both very informative.

  9. Dan Corcoran (b393capt) says:

    Great link Norse.

  10. Rob Emmet says:

    Evidently Garmin Plotters will pass Nexus NMEA 0183 data to the N2K bus now. I haven’t tried it but I have it on good authority that it works. Here’s a link to the pin-out and settings:

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