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fish finder vs depth sounder

Discussion in 'Boat Electronics' started by Gabriel Latrémouille, Feb 5, 2005.

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  1. Fish finders seem to provide more information (bottom type) than depth
    sounders. Are there any arguments for and against using either one on a

  2. Sandpiper

    Sandpiper Guest

  3. Larry W4CSC

    Larry W4CSC Guest

    I think the most important data you get, on a sailboat or any boat, from
    the depth sounder is "How close is the bottom to the keel?", you know, that
    awful crunching sound.

    I'd much rather have a charting "fishfinder" than that stupid digital
    readout from the sailing instruments, any time. With the fishfinder's
    chart you can easily see the TREND of the bottom, coming up shallow,
    staying level or going deeper. You'd have to log the depth on the digital
    sounder to see a trend. I'm too old and busy to keep all those numbers in
    my head.

    Aboard Lionheart, the old Garmin 185 GPS/fishfinder is the most valued
    depth indication....not the B&G Depth instrument behind it.
  4. Larry W4CSC

    Larry W4CSC Guest

    What I can't figure out is why I haven't seen a CD software of the Defense
    Department's underwater mapping system, making your $700 depth finder
    unnecessary. The DoD has mapping data of ever underwater place on the
    planet. This should be coupled with your favorite nav software so instead
    of the stupid old chart's little depth numbers, you'd get an underwater
    surface contour map in any direction around your boat's GPS the street maps ashore. Every known underwater
    obstruction would be there that they know of.

    Your measured depth would be correlated with the data's stored depth and
    the entire output 3-D display would be continuously depth-corrected,
    compensating for tides, etc.

    Here we sit still looking at a paper chart on a huge computer....stupid.
  5. M.F.

    M.F. Guest

    The newer versions of nobeltec charting software have a 3D view with your boat
    in the center.
  6. Jack Erbes

    Jack Erbes Guest

    I don't think DoD has that data. There are still some "gray areas" in
    the Western Pacific and who knows where else. You might ask the
    recently fired Skipper of the USS San Francisco about that.

    That was what we used to call a "CLM" (career limiting move).

  7. Larry W4CSC

    Larry W4CSC Guest

    Any punishment Navy gives him will be small in comparison to the ones in
    the minds of the forward sonar technicians at his favorite Naval

    Sitting up there in a hot drydock testing all those scanned transducers is
    NO FUN! Been there, done that, got the T-shirt....
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