Next message: Frank Reed: "Re: CelNav without sextant"
Alex E wrote:
"In other words, I was proposing the following imaginary experiment: suppose
your accidentally dropped your sextant in water:-) But your watch (and a
simple radio to check it) and the almanac remain. How well can you do with that?"
You wouldn't need occultations since you've got the radio to check GMT. You
could use sunrise/set to get LOPs accurate to 10 or 15 miles in typical cases.
Could you do better with a carefully measured "kamal" card? I think you might
be able to measure five or ten degree altitudes with a card and get better
LOPs than from sunrise/set, but that's just a hunch.
You might enjoy my "Lunars Game" from last December. It's here:
www.HistoricalAtlas.com/lunars/lungame.html
Frank R
[ ] Mystic, Connecticut
[X] Chicago, Illinois
