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Subject: Re: Navigation-L Survey
From: David E. Gorelick, MD (dgorelmd@XXX.XXX)
Date: Sun Jun 10 2001 - 21:03:55 EDT
Post replies to the list????
Well OK; but first: I'm a landlubber Navigator primarily since I have profound
motion sickness and am usually an embarassment to all aboard! :)
With that in mind, I have this awful avocational interest in things mathematical,
scientific and historical so..........there we be.
Dan Hogan wrote:
> OK. One more time. PLEASE respond to the survey. Even if you are just getting
> started.
>
> Post replies to the list primarily. I will summarize and post the results.
> Navigation-l subscribers listed 182. The response to the survey has been 10!.
>
> Results will be posted June 13.
>
> ******************************************
> Navigation-L Survey
>
> a) Dead Reckoning
>
> What is the method used most?
>
> Mid-Latitude-----: Always; if not just plain and parallel simplistically.
> Mercator Sailing-:
> Rhumb Line-------:
> Other(Name?)-----: I'll toy with great circle using Pub.No. 229 for the
> points. This just for fun.
>
> b) Sight Reduction
>
> Which is your primary Sight reduction method?
>
> Computer Program(Name?)--------: Never! why bother?
> Calculator(Name?)--------------: Yes! Nothing programmed; just a
> scientific calc with the trig functions
> Short Navigation Tables,
> H.O. 211 etc.(Name?)-------: Have played with this for a try; but I
> don't use it.
> Standard Navigation Tables,
> 229, 214 etc.(Name?)-------: Pub No. 229 if I use a table; I mostly
> do this to compare table method that requires Assumed Position with Calculator
> use of the DR.
>
> c) Plotting
>
> How do you do your plotting? On downloaded or purchased sheets using
> Weems & Plath Parallel Plotter (the one with the roller bar), simple straight
> edge and divider.
>
> Computer Program(Name?)---: none
> Universal Plotting Sheets-: downloaded or copied from a book; pad
> obtained at Celestaire
> Manoeuvring Board---------: none
> Radar Plotting Sheets-----: none
> Home Made(Describe)-------:
>
> d) Navigation Manuals
>
> Name your main reference manual:
>
> Bowditch 1995 Ed.------------------: Yes : and of course the Nautical
> Almanac
> Bowditch (pre-1995)----------------: No
> Mixter (Primer of Navigation)------: No
> Chapman's--------------------------: No
> Celestial Navigation for Yachtsman-: No
> Shute----------------------------------: No
> Shirk----------------------------------: No
> Porter---------------------------------: No
> Hemenway-------------------------------: No
>
> Name a manual/book that helped you the most:
>
> W.F. Buckley @ Airborne/Video----------:
> Le Cours des Glenans-------------------:
> Bowditch-1995--------------------------: Yes
> Practical Celestial Navigation(HO 229)-:
> Self-Contained Celestial Navigation----:
> Mariner's Celestial Navigation---------:
> Navigation Afloat----------------------:
> Cruising Under Sail (E. Hiscock)-------:
> Shute----------------------------------:
> Shirk----------------------------------:
> Porter---------------------------------:
> Hemenway-------------------------------:
> Mixter---------------------------------:
> Turner, Merle B. Celestial for the Cruising Navigator
>
> e) Do you use the Nautical Almanac?
>
> Commercial-----------: Always ! !
> USNO-----------------:
> Self-design Software-:
> Computer-------------:
> USNO Web Site--------:
>
Addenda: My "first read" was Howell, Susan Practical Celestial
Navigation. About 15 years ago ; got me started. Since my
interest is in applied math and history, I'll often do a problem in the comfort
of my home using calculator and also a slide rule to compare accuracies with the
AP method of Pub. No. 229.
And........ I'll occasionally do some Lunar's using Stark, Bruce Tables for
Clearing the Lunar Distance......
Since I have about 120 º of sea horizon from my living room and roof deck, I
spend many a leisurly evening with the trigonometry. Oh yes the explanatory
pages of the Almanac lend for many an experimental comparison.
> Dave
dgorelmd@XXX.XXX
Lat 33º 55' N Lon 118º 06' W (by my own sites for 4 yrs plotted
variously!)
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