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I still have my old HP-41CV general purpose calculator, including
the Navigation plug-in.  It was slow by today's standards but it was
probably the first self-contained almanac/celestial computer to hit
the marketplace.  I have forgotten the various functions in the plug-
in but it handled great-circle calculations, star identification and
more.  Many of you may be familiar with it.  Now, if I could only
remember where I last saw it . . .

Frank J.
Rochester, NY

Date sent:          Sat, 7 Jun 2008 01:36:12 -0700 (PDT)
Subject:            [NavList 5358] Navigation Calculators
From:               Anabasis 
To:                 NavList 
Send reply to:      NavList@fer3.com

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Does anyone on the list use navigation calculators?  If so, which
model?

I use this one:

http://www.xnumber.com/xnumber/photo_tamaya_nc2.htm

It's nearly as old as I am and has no built-in Almanac like the NC-77
does.  It does Celestial triangles, trig functions, and sailings.  I
use it daily at sea to check speed made good on the hour.  I have
also
used it to reduce sights (like a portable HO 229 etc).  I was given it
a few years ago by a retired Naval Captain who used it on his
sailboat
in the 1970's.  I do like how I can see it "think" for every
calculation.  A sailing takes a number of seconds, and the
navigation
triangles even longer.

Out here the favorite among many is the now discontinued
CelestComp
IV, but the parts are becoming scarce, so I don't think they will be
around too much longer here at sea.  Besides, most people are now
using the bridge computer with navigation programs now.

Jeremy


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