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Re: The mil as a unit of angle.
From: Trevor Kenchington
Date: 2003 Mar 14, 10:33 -0400
From: Trevor Kenchington
Date: 2003 Mar 14, 10:33 -0400
Richard, You wrote: >>300 mils would be North North East one-half North. There is no such >>thing as North East by North, which would be a full point northward from >>North East and so identical to North by East (i.e. 200 mil). >> >> > Right. N by E (200), I see that now, and halfway to NNE > (400) from there is NNE 1/2 N (300) because it is an odd > hundred mil number. You mean I got the others right? :-) > But would not 600 mils be NE by N since 800 mils is NE? See my delayed correction to my own ramblings. 6400 mils to the circle of 32 points means that 200 mils equals one point and 50 mils equals a quarter point. After that, it is just a matter of getting the naming of the points and quarter points right -- without dropping some of the words as I managed to do. 0 N 50 N 1/4 E 100 N 1/2 E 150 N 3/4 E 200 N by E 250 NNE 3/4 N 300 NNE 1/2 N 400 NNE 500 NNE 1/2 E 600 NE by N 700 NE 1/2 N 800 NE The "by" points are named from the cardinal and ordinal points (e.g. N or NE) not from the ones between (e.g. NNE). The quarter and half points are named from all of those (e.g. N, NE or NNE) but not from the "by" points -- or so they have been on the few compasses I have examined which have shown quarter points. And that replaces another blunder on my part, in which I wrote: >>The >>odd-numbered points are always named from the nearest cardinal or >>ordinal point (e.g. North or North East), not from the intermediate >>("inter-ordinal"?) ones like North North East. That confused the rule for naming "by" points with the rule for naming quarter and half points. (I was obviously not having a good day yesterday!) > So Hitchcock's "North by North West" is a valid designation > of the direction ... (looking for some paper) ... 5800 mils? > Or perhaps 326-1/4 degrees? "North by North West" isn't a compass point. The "by" points are only named as "by" one of the cardinal points (North, South, East or West). Think of the "by" meaning "a point in the direction of" -- N by E is almost North but a point towards the right. There is no need to specify whether it is towards the NNE, NE or E. All are in the same direction and economy of wording (plus concentration on the bigger thing) means that just "East" is used. I make NW to be 5600 mil (6400-800, where the 800 is 200 per point and there are four points to 45 degrees), so 5800 mil would be NW by N. [Maybe that was what Hitchcock wrote. I'm not familiar with that reference to his work.] >>(Not to compare with the >>complexity of lunars as a way of telling the time anyway!) >> >> > Umm... Where could I find something that explained the > lunar system? Having (inadvertently) demonstrated that the points system was beyond my abilities, when I had attempted to show the reverse, I was trying to add a bit of levity. The "lunars" are the lunar observations that get so much time on this list (as they should), not a different unit of time. I guess there is a moon-based time unit in the lunar month. It is still the basis of the Islamic calendar, which is still very much in regular use in much of the world. [When I was based in Bangladesh, the English-language newspapers had three dates on the masthead: Western, Islamic and Bengali. Following the Mongol conquest of India, the new Islamic rulers discovered that their lunar calendar didn't work very well in an area where rice planting had to be timed to the solar year and its monsoon cycle. Hence the invention of a similar but different Bengali calendar. Now the country seems to run on three different calendars for religious, secular and business/international purposes respectively.] 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