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    Re: Backup Celestial Navigation Kit
    From: Bruce J. Pennino
    Date: 2015 Apr 30, 22:21 -0400
    Nautical Almanac adds a lot. Maybe Weems 1927 along with Pub 249.  Must have two hand held compasses.....one cheap $ 10 USD, one hockey puck. Gotta have two hand calculators with equation sheet ( I can’t memorize  all of them).

    Bruce














     
    Sent: Thursday, April 30, 2015 7:51 PM
    Subject: [NavList] Re: Backup Celestial Navigation Kit
     

    1. Ebbco and Bris.

    2. Pub 249 Sun LTA. (1 page)

    3. A rated 8 day aircraft dash clock. ( they are surprisingly accurate)

    4. Haverersine tables for Doniol Haversine reduction w/ Ix diagram. (2 pages)

    5. Paper back Trig Log tables for classic reduction.

    6. Polaris Latitude Wheeler for northern latitudes.

    7. Wet Notes and .7mm plastic mechanical pencil.

    8. Compact protractor. (Custom T Plotter)

    9. 6" Pocket Doric sliderule.

    Everything is inexpensive, light weight, and fits easily into the Ebbco case. This is better than just a get home kit. For getting home all a sailor needs is a Davis MK 3 and a Sun declination table to latitude sail with (no timing needed).

     

    Greg Rudzinski

    From: Robert VanderPol II
    Date: 2015 Apr 30, 15:10 -0700

    So what would everybody put in a package for the ultimate backup celestial navigation getup?

    Basic scenario: half way across the ocean of your choice you are hit by lightning and every piece of electrical and electronic equipment on the boat is fried.

    Givens:

    Try to keep the costs down to encourage the hoi polloi to think this is a reasonable expenditure.

    Try to keep things as simple as possible so folks won’t be discouraged from practicing once a week or so.

    Try to minimize weight and volume to . . .

    You all get the idea.

    This is intended to get someone home or to a port where repairs can be made, it isn’t intended to be able to continue a voyage to a difficult landfall with lots of outlying dangers.

     

     

     

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