Yamaha Command Link, NMEA 2000 or not?

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.

8 Responses

  1. Dan (b393capt) says:

    Just a guess here … maybe that “triducer” is a Maretron DST100, and the patch cable is to connect the DST100 to the Yamaha Hub ?

  2. Finnbarr P. Murphy says:

    I worked in the computer industry during the early days of computer networks. The same questions were raised by management and bean counters – liability, what ifs, ” We do not control the network, so how can we guarantee interoperatability”, etc.
    InstallFests helped prove interoperability and clarify standards interpretations, open free standards helped also – look at the Internet RFC “standards’ process”. Licenses to use helped also – basically users agreed to accept certain legal restrictions in exchange for using the technology.
    One of the problems with the NMEA 2000 standard is the absurd cost of the standard. If it were freely available, a lot more NMEA 2000-related hardware and software development would occur, a lot more eyes would look at the standard and find the ambiguities and gray areas, raise interpretation requests, etc.

  3. Dan (b393capt) says:

    “One of the problems with the NMEA 2000 standard is the absurd cost of the standard”
    … it would seem the way they have gone about things has assured themselves no access to cheap labor. I would imagine for the absurd price they charge, they are still cash poor as a function of keeping the spec closed and as a result severly underfund many of the efforts that are needed for the spec to florish, that other organizations have taken care of for free by interested parties in the industry and the user base.
    Maybe one of us should try to get elected as chairman or hired as executive director/president, and bring the right vision to the specification process and licensing model.
    I vote for Ben.

  4. George says:

    Liability is a real concern with any open system, that is the weakness. There is also the issue of support, you do not want to be spending lots of money on field service personnel just to learn that some other (possibly a competitor’s) product is causing your engine to fail.
    In the computer world I have learned that nothing works unless it is tested. A truly open network cannot be completely tested, especially when new devices are added. That is the weakness of open systems — you would not want to fly on an airplane built up out of supposedly compatible parts ordered by the Airline company’s beancounters. We only fly because we know that the exact configuration of plane that we are stepping into has been certified by the FAA as “airworthy.”
    This is not to knock open systems, especially for navigation. It is absolutely great that I can mix-and-match parts, possibly saving a buck or two in the process. I’m just trying to provide some perspective for why an engine company may be reluctant to jump onto the bandwagon. Engines are life critical devices, and have to be held to a different standard than the electronic toys that we all love.

  5. Dan (b393capt) says:

    That sounds very compelling … but I believe in this case with Yamaha the entire network can go down, even the battery can die, and the engine still starts/stops, rotates, and throttle controls work perfectly. Normally those things are put on mechanical linkages or extremely simple robust dedicated wiring for each function, that are not intermixed with engine sensors such as temp sensors or tach senders.
    I think our open systems debate is therefore still valid and extendable to engine manufacturers.

  6. JC says:

    Yamaha Command Link, NMEA 2000 or not?
    I called Maretron for that command link to Nmea2000 cable, the answer was that Yamaha prohibit them to sell the cable.
    Now I’m making my own cable
    One problem
    The garmin 5212 doc on the NMEA2000 port pinout is 0,same for command link

  7. George says:

    I had a somewhat surprising discussion with Simrad about their IS-12 instruments. They are NMEA 2000 but I was pretty strongly discouraged from expecting them to work with any non-Simrad NMEA 2000 sensors. Although I got no guarentee that the IS-15 (NMEA 0183) instruments would work with other sensors it was pretty strongly hinted that I should go that route if I wanted interoperability.
    Naive as I am, I would have thought the opposite. The whole point of seeking out NMEA 2000 instruments is that it is supposed to be a better spec with certification and all that jazz to give you some confidence that company A’s sensor will work with company B’s meter. It doesn’t seem to be working out that way — yet, at least.
    It doesn’t really sound as if the companies are fully onboard to make the systems work. Garmin has a partial implementation. Yahama pretends that their system is not NMEA 2000, and Simrad flat out discourages the use of it. It really goes back to my earlier post; nobody wants to support hybrid networks because they don’t want to debug the ‘other guys’ system.
    I’m not sure that I would try to get around Yamaha’s reluctance to expose their network. You never know what their testing has revealed since they announced that they would support it someday. I’d wait until their boffins are satisfied that it is safe. All electronic devices are fail-safe — until they fail!

  8. Dan (b393capt) says:

    b393capt wrote earlier “Just a guess here … maybe that “triducer” is a Maretron DST100, and the patch cable is to connect the DST100 to the Yamaha Hub ?”
    … seems like this might be correct.

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