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The Apollo Flight Plan has distinctive patterns of markings (variously solid, broken, etc,) as well as other indicators (circular markings and the lines with labels such as CRO, MSFN, etc.).

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What do these markings mean?

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This copy of the flight plan has a cool decoder of all the symbology on page ix. The pages immediately before this image have all the acronyms.

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    $\begingroup$ Doh! I looked through my copy dozens of times but couldn't find that, but there it is (on p. xi in the original B&W version). $\endgroup$ – orome Jul 21 at 18:22
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    $\begingroup$ @orome I'm glad you asked the question, I hadn't ever seen this annotated page myself. $\endgroup$ – Organic Marble Jul 21 at 18:26

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