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    Re: CN on Mars
    From: Stan K
    Date: 2016 Feb 6, 18:00 -0500
    Wouldn't it still be 30 Martian nautical miles?

    -----Original Message-----
    From: Robert VanderPol II <NoReply_RobertVanderPolII@fer3.com>
    To: slk1000 <slk1000---.com>
    Sent: Sat, Feb 6, 2016 12:40 pm
    Subject: [NavList] Re: CN on Mars

    The New York Times best selling novel THE MARTIAN by Andy Weir has the main character Mark Watney making a sextant to determine latitude by Deneb and timing Phobos to determine longitude (page 288). Is the star Deneb a good choice for a pole star? His Mars made sextant should be good to half a degree where 30' would be better than 30 nautical mile precision. 
    Greg Rudzinski
    Actually 0.5° angular measurement would result in about 16nm accuracy due to the smaller diameter of Mars.
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