Marine Mobile Rig on 2m?

Discussion in 'VHF/UHF - 50Mhz and Beyond' started by WA7F, Jul 13, 2021.

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  1. WA7F

    WA7F Premium Subscriber QRZ Page

  2. WA7F

    WA7F Premium Subscriber QRZ Page

    Just what the doctor ordered for the antenna too.
  3. K7JEM

    K7JEM Ham Member QRZ Page

    If you find a somewhat older VHF commercial radio, you might look up its FCC ID and check for part 80 certification. This isn't real common, but it's not extremely unusual, either.

    The technical specifications for part 80 were virtually the same as part 90 equipment, but you had to tell the FCC that you wanted it certified for those parts, they just didn't do it.

    Most people do not know that the FCC actually doesn't certify the radio equipment, it is done by third party labs that are contracted by the manufacturer to do the tests, then report to the FCC their findings. In the initial application, the manufacturer tells the FCC which FCC parts they are wanting to get certified. Sometimes, they come in later and say "we want that part 80 certification too", so it isn't always done initially.
  4. G8FXC

    G8FXC XML Subscriber QRZ Page

    For those of us on the left side of the pond, what is the distinction between "part 80" and "part 90"?

    The fundamental issue over here that would effectively make it impossible to legally satisfy the OP is that a marine band legal radio cannot permit operation on non-marine band frequencies. This is because the marine band operating licence does not require any technical knowledge and relies on the radio equipment blocking any attempt at illegal operation - either intentional or accidental. The marine band radio on our boat is hard programmed to the 80-odd allocated marine channels and there is no software available to the general public which will permit that programming to be changed. My MARS modded ham transceivers are perfectly capable of transmitting on the marine channels and can be set to fully meet the technical specifications of marine band operation, but they are not legal to use there because they will allow me to configure illegal options like excessive power or wider deviation. A big no-no is the ability to transmit on the channel zero reserved for the coastguard - they really don't like that!

    Martin (G8FXC)
  5. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    When sailing during the month of May, on a beautiful spring day just key up and announce, "What a nice May day." Might get some attention, kind of like yelling "Hi" to your friend Jack seated several rows away on a crowded airplane.
    WA7F likes this.
  6. G8FXC

    G8FXC XML Subscriber QRZ Page

  7. K6CLS

    K6CLS Ham Member QRZ Page

    FCC regulations are US Federal law, in volume 47 of Code of Federal Regulations. Different radio services are named as 47 CFR part N. N equals 80 is for Marine use including VHF. Part 90 is for Land Mobile systems, including one near part 80 VHF frequencies. Part 95 is CB including GMRS. Part 97 is Amateur radio.
  8. G8FXC

    G8FXC XML Subscriber QRZ Page that case I would expect that parts 80 and 90 are close to identical, but fairly well removed from part 97...

    Martin (G8FXC)
  9. K7JEM

    K7JEM Ham Member QRZ Page

    The rules for part 80 and 90 are quite a bit different. But the technical rules for the two services are virtually identical, ie. maximum deviation, spurious, emission mask, and other spectral purity things. After all, a maritime VHF radio is basically an FM "business band" radio for all intents and purposes. And the VHF maritime frequencies are smack in the middle of our VHF "high band" spectrum, which roughly runs from 150-170MHz.

    Since part 90 radios (business and public safety) are only supposed to be programmed by people who know what they are doing, and the radios are not (typically) able to be "front panel programmable", then if a radio is certified for both part 90 and part 80, a mix of those frequencies can be available as selectable channels for the end user. For example, a sheriff's office mobile radio might have all sorts of LE type frequencies, AND the local maritime channels so that he can communicate directly with boaters, if that need arises. Amateur radios require no sort of certification in the USA, so it is permissible to use a part 90 radio to also contain amateur frequencies. As long as the radio isn't modified beyond the normal amounts, then its certification remains for part 90 (and part 80 if it includes that).
  10. WA9ZZZ

    WA9ZZZ Premium Subscriber QRZ Page

    Does the narrow banding that was imposed on Part 90 also apply to Part 80?

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