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    Re: Slide rules in movies
    From: Frank Reed
    Date: 2013 Jul 15, 15:28 -0700

    Andrew, you wrote:
    "Slide rule people have a database of slide rule appearances in the movies etc."

    Thanks. It appears the database is members only. I may sign up later to have a look. If you're a member, I hope you'll make sure they have this one in their database. It's an important 250 milliseconds in the film history of slide rules.

    You also wrote:
    "Also, the fact that slide rule in your picture is neatly aligned with latitude line means that either movie portrays person with moderate OCD, or, more likely, whoever set up the scene did not know what is this thing."

    Ha. Yes, it's probably the latter. The main characters (two strange children about 12 years old) would probably qualify for a diagnosis of OCD, but this is strictly a whimsical "scene setter" --a brief transitional image with no suggestion that anyone is actually using a slide rule for anything. It's just a prop.

    I said previously that this wasn't related to navigation, but there's always a way. The nautical charts that appear in this movie are modified from actual nautical charts. For example the movie's "New Penzance Island" is a somewhat modified version of Fishers Island, New York. The little chart image that I posted earlier has a compass rose that shows a variation of 13°00' West labeled "1940". That gives us a line of position. It passes west of Fishers Island aligned roughly along NWbN/SEbE (http://historicalatlas.com/mag/magframes.asp?indate=1940).

    -FER

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