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Error in FPM 20 lesson Polar High Altitude Enroute Chart 5 AT (HI)

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  • Error in FPM 20 lesson Polar High Altitude Enroute Chart 5 AT (HI)

    The lesson states on page 9 that the chart will only show correct scale at the standard parallels of 45 and 65 and that the front of the map states this. It does not and would not as it is a polar stereographic projection.

  • #2
    Thanks for the info; it looks like a paragraph from another section has been inadvertently has "strayed". I have written a correction: The scale on this chart is only correct at the point of tangency, where the chart touches the globe, in this case at the Pole; the scale then expands away from the Pole. The AT(HI)5 has a scales at the top of the chart that cover 2 panels and is accurate for the area of the chart covered by those panels. However, the most reliable method and one that deals with distance measured across different panels is the third method.

    Thanks again and good luck with the course.
    BGS TKI

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