December 22, 2020 at 6:21 pm #9980Ken Gebhart, Jr.Administrator
I think it would be very interesting to know how our members got started in celestial navigation. Please take a moment and share with us your story.December 23, 2020 at 11:44 pm #10043manxcatParticipant
Reading about Amelia Earhart and Fred Noonan got me interested in celestial navigation. I am very intrigued by celestial navi; unfortunately, I am a very poor when it comes to math. All I know about trigonometry is that my older, much smarter sister hated trig because it was so-o-o-o difficult for her. I understand there are computer programs that do most of the math for you, as well as the other ‘scut’ work? I saw the classified add on your site, advertising a bubble sextant… can these be used at sea; or, on land? Can some marine type sextants be used when the horizon in not visible [a pan of mercury?]
Thanks & Have a Nice Day,
JosephDecember 24, 2020 at 9:27 am #10045Ken Gebhart, Jr.Administrator
Don’t let the math scare you. It looks difficult because it is unfamiliar to you. Once you’ve reduced a few sights the “lightbulb” will go off. There are numerous worksheets, calculators, apps and computer programs available to help you with “the math” .
Bubble sextants can be used on land, sea or air.
You need some type of horizon, whether it is natural or artificial to take a sight. Artificial horizons come in a variety of flavors. You can use a pan of oil [not mercury!]. Davis Instruments manufactures an artificial horizon which can be used with any type of sextant. Celestaire manufactures a Practice Bubble Horizon which can be used on most modern marine sextants and Cassens & Plath manufactures a Professional Bubble Horizon which can also be used on most modern marine sextants.March 15, 2021 at 10:18 am #10423Steven CarletonParticipant
When I was a kid, I read several novels by the Australian author Neville Shute about his experience as a bomber navigator in WWII. It seemed like a miracle to me that they could fly above the cloud cover in the dead of night and determine a reasonably accurate position with a 3 lb. hand-held device and a book of tables. Then in 1976 I found a functional air sextant and a Rude star finder at a camera store – the owners didn’t know what they were, and let me have it all for $15.00. I still use them, today. The hook was set!
You must be logged in to reply to this topic.