NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Calibrating a sextant scale
From: Richard M Pisko
Date: 2007 Nov 25, 23:37 -0700
From: Richard M Pisko
Date: 2007 Nov 25, 23:37 -0700
On Sat, 24 Nov 2007 09:25:33 -0700, Alexandre E Eremenkowrote: > No degrees anywhere. It was simply called > "one angular division" or > "one thouthands" in literal translation from Russian. Similar to the USA: the "mil" is supposed to be an approximation of one thousandths of a radian. Actually, I think the French used the 1/6400 division in the late 19th century, and the USA borrowed it. At least I saw a French box compass with a translation descibing the units that way some time ago. It wasn't immediately obvious from the picture, because it followed the points of the compass quite well, but was not the grad/gon division. > The rule was that you see an object of size 1 meter > at 1 kilometer distance under the angle > "one division"=1/6000 part of the circle. > That is they assumed that pi=3 for mental calculations. > ("The Device", of course performed calculations exactly). How would that angular division of "one thousandths" be pronounced in Russian? I would have to see it as spelled phonetically by an English speaker, unfortunately. The US "mil" sounds just like "mill" in "Down by the old, mill, stream." > The airforce and navy used degrees, so there were > communication problems when any interaction was required:-) Glad to hear interservice miscommunication is international. :-) Taske care, -- Richard . . . Using Opera 9.2.4 after the "Dog" died --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---