VHF RF Exposure

  • dandorn
    M.I.N.N.E.S.O.T.A.
    Posts: 3211
    #1235282

    The first page of my instruction manual states the
    following:

    RADIO OPERATOR WARNING

    “Icom requires the radio operator to meet the FCC Requirements for Radio Frequency Exposure. An omnidirectional antenna with gain not greater than
    9 dBi must be mounted a minimum of 5 meters (measured
    from lowest point of the antenna) vertically above the
    main deck and all possible personnel. This is the minimum
    safe operation distance estimated to meet all RF exposure
    compliance requirements. This 5 meter distance is based
    on the FCC Safe Maximum Premissible Exposure (MPE) distance
    of 3 meters added to the height of an adult (2 meters) and
    is appropriate for all vessels.

    For watercraft without suitable structures, the antenna
    must be mounted so as to maintain a minimum of 1 meter
    vertically between the antenna, (measured from the lowest
    point of the antenna), to the heads of all persons AND
    all persons must stay outside of the 3 meter MPE radius.

    Do not transmit with radio and antenna when persons are
    within the MPE radius of the antenna, unless such persons
    (such as driver or radio operator) are shielded from
    antenna field by a grounded metallic barrier. The MPE
    radius is the minimum distance from the antenna axis that
    person should maintain in order to avoid RF exposure higher
    than the allowable MPE level set by FCC.”

    To me this is saying I shouldn’t be using
    this on my single console aluminum fishing boat. Am
    I misreading this???

    Thanks for your opinion,

    Dan

    saguarokid
    Waterloo, Ia
    Posts: 84
    #570573

    Hey..I can finally wear my tin foil hat and matching trench coat…

    snake_plissken
    Central, MN
    Posts: 97
    #570575

    I’m going straight to Ebay to find myself one of those beer can hats somebody’s grandma knit back in 1975

    Brian Klawitter
    Keymaster
    Minnesota/Wisconsin Mississippi River
    Posts: 59996
    #570623

    It is a legal dept. warning although there is Radio Frequencies (RF) emitting from the ant.

    I doubt a person would feel 25 watts but they are radio waves none the less. Although a differant frequency, micro waves cook by micro radio frequency.

    Back in the CB radio days, some would up thier power from 4 watts to 100 or more. 100 watts will light up a florecent light tube…out of it’s fixture. A freind of mine touched a steel whip antenna will a 350 watt transmission was taking place and recieved a nasty burn on his hand…his skin turned white.

    Personally, I wouldn’t recommend grabbing hold of an ant for the reasons above and it also screws up you signal pattern.

    I wouldn’t think casual use of a marine radio with it’s ant closer than what’s recommended is physicly going to hurt anyone. Cell phones next to your head…and lead sinkers are much more of a worry to me!

    chris-tuckner
    Hastings/Isle MN
    Posts: 12318
    #571104

    Quote:


    Cell phones next to your head…and lead sinkers are much more of a worry to me!


    In your case that ‘splains a lot. An awful lot!

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