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    Re: Practice CN on cruise ship
    From: Bruce J. Pennino
    Date: 2017 Oct 29, 12:12 -0400
    On a cruise ship, better to throw a stale donut from the railing and time the fall.
    Sent: Saturday, October 28, 2017 4:28 PM
    Subject: [NavList] Re: Practice CN on cruise ship
    I became very good friends with my meteorology professor at the University of Illinois in Chicago. His apartment is on the fourth floor of a building on South Shore drive in Chicago, with the back of the building right up against The Lake. You can spit out of this back window into the lake. We had already learned about Torricelli carrying his newly invented mercury barometer to a top of a mountain to discover that atmospheric pressure lessened with altitude (it does), the first altimeter. The first time I was at his house I asked him how far above the water his window was and he said he had never measured it. So I said, "well, just get a barometer and bring it up here..." and I could see the words forming on his lips that a barometer would not be accurate enough to measure the short height up to his window, so I continued, ".... and throw it out the window and time the fall."


    From: Marty Lyons <NoReply_MartyLyons@fer3.com>
    To: garylapook---.net
    Sent: Saturday, October 28, 2017 9:15 AM
    Subject: [NavList] Re: Practice CN on cruise ship
    Just don't drop your sextant.............Time the fall of the sextant from your observing height until it hits the water to a fraction of a second, .......
    Sorry, just could not resist.
    Seriously, the wealth of knowledge on this forum is amazing.

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