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In my earlier message today,
I gave a few web sites on this, and an instruction
how to find 5000 others.
I could not browse all of them:-)
so cannot say at the moment whether any has something
to do with Cel Nav, but there are many sites mentioning
Sat Nav.

Russian manual that I read in 1960-s had a special chapter
on "Reduction of altitudes when North of the Polar circle."
I don't remember what was in this chapter, except the problems
with Mercator maps (their distortion becomes large).
To this I add that this Russian manual recommended to always
draw your position lines on the map (rather on a separate sheet)
because each position line is useful by itself, not only their
line of intersection.

Alex.

On Mon, 25 Oct 2004, Trevor J. Kenchington wrote:

> George asked:
>
> > I would like to learn more about the modern Northern sea-route. Is there a
> > recommended publication in English? Does it still operate? How big are the
> > convoys? Where do the ships  over-winter?
>
>
> I once read an article about the shipping route through the North East
> Passage but, despite scratching my head for the past 24 hours, I can't
> recall where. The one point that I do remember is that the route has
> some shoal areas (between the ice edge and the land) such that ships
> must be either smaller than one would want for such a long voyage or
> else designed to be relatively shallow draft.
>
> In my abortive search for the article, I did come across a review of a
> book that would likely contain pointers to sources that would answer all
> of George's questions, though its focus is elsewhere:
>
> "The Challenge of Arctic Shipping" by D.L.Vanderzwaag & C.Lamson
> (McGill-Queens University Press, 1990). Should be available in the U.K.,
> though perhaps only from research libraries of institutions with an
> interest in the arctic, in shipping or in environmental management.
>
>
> Note that this is the North East Passage (the Northern Sea Route or
> "Glavsevmorput" to the Russians). The North West Passage is a much more
> dubious commercial prospect, partly because the heaviest ice is centred
> on the American side of the pole (thus away from the Asian side) and
> partly because of the Canadian archipelago complicating the route.
>
>
> Is ice navigation an appropriate topic for the list? From what little I
> understand of the topic, it doesn't have much to do with position fixing
> but rather finding ways to manoeuvre around the ever-changing obstacles
> created by the ice.
>
>
> Trevor Kenchington
>
>
> --
> Trevor J. Kenchington PhD                         Gadus@iStar.ca
> Gadus Associates,                                 Office(902) 889-9250
> R.R.#1, Musquodoboit Harbour,                     Fax   (902) 889-9251
> Nova Scotia  B0J 2L0, CANADA                      Home  (902) 889-3555
>
>                      Science Serving the Fisheries
>                       http://home.istar.ca/~gadus
>

   

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