Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: Definition Drift, WAS: Bowditch 1995 Table 18
    From: Bill B
    Date: 2005 Feb 5, 03:50 -0500

    Do these British studies/research cross cultural boundaries, including
    cultures that may read bottom to top, left to right, or some combination
    > Peter-
    > I agree with you about digital information not always being the best. Among
    > the tidbits...I'm sure you've seen and used guages on various cars or other
    > instrument panels. Supposedly some British powerplant study in the 60's
    > determined that the most effective way to set up banks of power gauges was
    > in vertical format, i.e.
    > 9
    > 8
    > 7
    > 6
    > 5 (needle)
    > 4
    > 3
    > 2
    > 1
    > with the needle floating up and down across the guage, like an elevator cab.
    > The reason for this? The human eye/mind are set up to perceive DIFFERENCES
    > and changes. So when you've got fifty gauges set up side by side, and they
    > all should be on "5", the eye immediately picks up on anything that is
    > literally out-of-line. Numbers are nice but they aren't the best way to
    > present the picture all the time, especially when they are flashing and
    > changing and presenting too much information. Rate of change is still
    > easier to read from an analog gauge, even if an additional digital
    > rate-of-change meter would be more accurate.
    > Racing cars do something similar, they will rotate the round gauges so that
    > all needles point to 12 or 1 o'clock when they are in the normal
    > range--regardless of what number that is. Same purpose, you can scan them
    > all with peripheral vision and the "odd man out" pops up quickly.
    > After our Indian Point powerplant debacle, caused by some operator grabbing
    > the wrong "they all look alike, isn't that nice?" handle, the nuke plants
    > here LITERALLY used handles from bar taps! It's hard to mistake two
    > different color/shape/size handles for each other.

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site