NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Polar navigation
From: Gary LaPook
Date: 2009 Oct 19, 02:53 +0200
From: Gary LaPook
Date: 2009 Oct 19, 02:53 +0200
Sounds like "grid navigation" to me. gl frankreed@HistoricalAtlas.com wrote: > For the northeast and northwest passages through the Arctic for trade, which look likely to be open in summers for at least a decade if not permanently, I don't think there's any real reason to switch to a different projection since both of the routes are below 85 degrees north. > > On a related note, the recent discussion of submarines (and my own visits to thirteen museum subs in the past ten weeks) got me reading about the INS aboard the submarine Nautilus during its visit to the North Pole under the ice in 1958. One article in a popular magazine mentioned that they used non-standard coordinates for the passage, rotated 90 degrees from the standard lat/lon grid so that the coordinate poles were on the Earth's equator --thus no annoying coordinate singularity at the actual North Pole. > > -FER > PS: Interesting trivia: the USN's own inertial navigation project did not produce a useful system until years later (so, for example, USS Triton was primarily navigated by dead reckoning plus frequent celestial navigation during its submerged circum-navigation in 1960). For Nautilus, Skate, and maybe a few other early nuclear submarines outfitted for operations under the Arctic ice, the INS was actually taken almost unmodified from the cancelled USAF Navaho missile program. > > > > > > > > --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList+@fer3.com -~----------~----~----~----~------~----~------~--~---