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T&T: Re: Navigation and chart scanning

From: Faure, Marin (no email)
Date: Tue Feb 01 2005 - 22:10:59 EST

  • Next message: James Parvey: "T&T: RE: Davit Hoist Remote Control"

    >Larry said-
    >Any chart depths greater than 4' are irrelevant except when looking for
    an anchorage. I need charts to tell me where I am and I will be
    satisfied to know that within a few hundred yards. I suspect my needs
    are similar to those of the vast majority of TWL members, give or take a
    few feet in draft and a few knots in cruising speed. For us, many of the
    features in the commercial navigation programs (Cap'n, Nobletec, MaxSea,
    ChartView, etc.) are overkill.

    Somebody posted a comment here awhile ago that said there were two kinds
    of boaters: the ones who sit mostly at the dock and outfit their boats
    with every gizmo known to man, and the ones who keep their boats simple
    and actually use them. I'm not sure I'd go quite so far as to limit
    boaters to being in one of these two categories only, but there is some
    truth in what this person said.

    Boating, like flying, is a world full of variables. Many of these
    variables force decisions that could have serious consequences if the
    decisions are wrong. One of the objectives in being a safe pilot is to
    eliminate as many variables as possible from the equation of getting
    from Point A to Point B because the fewer variables there are, the fewer
    opportunities there will be to make a bad or incorrect decision. I
    believe the same can be said of being a safe skipper.

    You can make navigating a boat as complicated or as simple a process as
    you would like it to be. Which route you go will depend on your
    ultimate objective. To make an example of someone on this list without
    his permission, Capt. Mike Maurice makes a living getting people's boats
    from Point A to Point B. This means he's confronted with all manner of
    variables in terms of water and weather conditions, the condition and
    capability of the boat, and the abilities of the people on his crew.
    His primary objective (I assume) is to get the boat safely to Point B.
    To that end, he wants (as he has stated) a navigation system that tells
    him what he needs to know with complete reliability and that can be used
    and interpreted no matter what sort of other variables he may be dealing
    with at the time, like crappy weather, a sick engine, an iffy electrical
    system, and so on.

    So in this "real life" situation, the last thing he or anyone else in
    this position needs is to have to wade through ten layers of menu items
    to get his nav (or radar) system to do what he needs it to do Right Now.
    A color wheel that lets you select what color you want the lettering and
    navaids and land mass contours to be on the screen is real clever and
    fun to play with at the dock, but it's not something one is likely to
    need in real life. (I'm making that up-- I don't know if the current
    generation of complex nav systems have color wheels, but you get the
    point.)

    Navigating a boat is really easy in terms of what you need to know. You
    need to know where you are in relationship to everything around and
    under you, you need to know where you'll be if you keep going the
    direction you're going, you need to know what route to follow to get
    where you want to go without hitting anything, and you need to know how
    much time getting from one place to another is going to take. That's
    pretty much it. Okay, there may be times when it's handy to know where
    you've been in case you need to follow the bread crumbs to get home.

    So while a nav program that can show you the relationship (in millions
    of colors) between your boat's speed over the ground and the phases of
    the moon is really cool from a "look what my nav system can do" point of
    view, the reality is that it's probably pretty useless information.
    Because the deal about having as few variables as possible in boating
    and flying also applies to the equipment and systems you're using.

    When the shit hits the fan and you're worrying about big waves and high
    winds and poor visibility and stuff is sliding all over the cabin, most
    people's brains have a way of narrowing their functional bandwidth,
    particularly people who don't do this sort of thing for a living, which
    is most of us on this list. We may be able to remember how to set a new
    course in a nav system if it's a matter of either punching up one that's
    already in there or entering an A-B course, particularly if there are
    dedicated buttons for doing so. But our ability to remember complex
    command sequences or where things are in a menu-driven system will be
    diminished dramatically, particularly when we are worrying about other
    things like that "funny noise" in the engine and why does the bilge pump
    light keep coming on? A system that's a snap to operate at the dock on
    a nice day with the operator's manual handy can become a mind-numbing
    mental block if the mind is already struggling to fight back panic.

    And don't envision panic to be something that happens in a "Perfect
    Storm" scenario. It might take something like that to make Capt.
    Maurice panic, but I might start to lose it in six foot waves with lots
    of logs in the water around me. Someone else might start to panic when
    they unexpectedly find themselves short of their destination after dark.
    But regardless of what it takes to put someone into "Oh God, what do I
    do now" mode, the fact remains that for all of us in that mode, things
    need to be REALLY simple in order for us to use them effectively to help
    us make the right decisions. And that's when-- as Capt. Maurice has
    pointed out several times-- you need systems with clear, basic functions
    and no-brainer controls.

    All of which is a very long way of saying I agree with what Larry has
    written. Most of us don't need a quarter of what these "Microsoft
    mentality" nav systems contain, and for those skippers who venture
    beyond the comfort of familiar waters and weather, these complex systems
    may actually be a detriment to the goal of getting a boat safely from
    Point A to Point B. My opinion of course, which is worth exactly what
    you paid for it.

    ______________________________
    C. Marin Faure
    GB36-403 "La Perouse"
    Bellingham, Washington
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