Nautical Miles

Brag · 10-10-09, 09:05 AM

All navies still use nautical miles for navigation as the results from angle computations come in seconds, minutes of arc, which is miles or fraction of miles. One nautical mile = 1852 meters.

Measurements on a nautical chart are also in miles, you take dividers and spread them over the latitude scale on the edge and measure--result is nautical miles or fraction.

For gunnery, the metric system was and is used.

Though I am a metric nut and find the statute mile used in the USA an obsolete anachronism, In SH3 it drove me nutz the unrealistic Kms. use.

looney · 10-10-09, 09:27 AM

It shouldn't be to hard, to find out what was used by the U-boats. I hope it will be real

Thomen · 10-10-09, 09:54 AM

Hitman nailed it. U-Boats used nautical miles (nm/sm) for navigation, distances traveled, etc and meters for gunnery, object distances and so on.

Distances for ships, plane and so on where given as example,as: E=20hm or as full metric meter number, ex: E=2 000m.

Sailor Steve · 10-10-09, 12:55 PM

Quote:

Originally Posted by Brag

All navies still use nautical miles for navigation as the results from angle computations come in seconds, minutes of arc, which is miles or fraction of miles. One nautical mile = 1852 meters.

The nautical mile was established at 1852 metres in 1929. Ships and aircraft the world over still measure their speed in knots, or nautical miles per hour.

pythos · 10-10-09, 02:57 PM

I was just about to say that sailor steve. Most stuff in Aerial navigation is done in Nautical miles. Though for some reason visibilities are done in statute, as is the radius of most navigation aids. Really outdated and can really mess some people up.

Ships and other sea going vessels use nautical miles for measures, and speed is Knots per hour.

From what I heard the term Knot came from measuring the amount of time a long rope with evenly spaced knots tied into it, took to unravel to its full extent, while a ship moved. Not sure how true that is, but if it is true, kinda ingenious in its simplicity.

Sailor Steve · 10-10-09, 03:16 PM

Yep, that's exactly the way it worked. Wiki has a good article on it, including links to the chip log and line.

http://en.wikipedia.org/wiki/Knot_(unit)

Platapus · 10-10-09, 05:20 PM

Quote:

Originally Posted by pythos

Ships and other sea going vessels use nautical miles for measures, and speed is Knots per hour.

Knots, not knots per hour. Knots per hour would be a measure of acceleration.

Speed is either Nautical Miles per hour or Knots.

10-10-09, 09:05 AM	#1
Brag Navy Seal Join Date: Nov 2006 Location: Docked on a Russian pond Posts: 7,072 Downloads: 2 Uploads: 0	All navies still use nautical miles for navigation as the results from angle computations come in seconds, minutes of arc, which is miles or fraction of miles. One nautical mile = 1852 meters. Measurements on a nautical chart are also in miles, you take dividers and spread them over the latitude scale on the edge and measure--result is nautical miles or fraction. For gunnery, the metric system was and is used. Though I am a metric nut and find the statute mile used in the USA an obsolete anachronism, In SH3 it drove me nutz the unrealistic Kms. use. __________________ Espionage, adventure, suspense, are just a click away Click here to look inside Brag's book: Amazon.com: Kingmaker: Alexey Braguine: Books Order Kingmaker here: http://www.subsim.com/store.html For Tactics visit:http://www.freewebs.com/kielman/

10-10-09, 03:16 PM	#6
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	Yep, that's exactly the way it worked. Wiki has a good article on it, including links to the chip log and line. http://en.wikipedia.org/wiki/Knot_(unit) __________________ “Never do anything you can't take back.” —Rocky Russo Last edited by Sailor Steve; 10-10-09 at 03:29 PM.

10-10-09, 09:27 AM	#2
looney Commodore Join Date: May 2007 Location: Sneek, The Netherlands Posts: 635 Downloads: 43 Uploads: 0	It shouldn't be to hard, to find out what was used by the U-boats. I hope it will be real

10-10-09, 09:54 AM	#3
Thomen Ace of the Deep Join Date: Aug 2008 Location: West Virginia Posts: 1,207 Downloads: 14 Uploads: 0	Hitman nailed it. U-Boats used nautical miles (nm/sm) for navigation, distances traveled, etc and meters for gunnery, object distances and so on. Distances for ships, plane and so on where given as example,as: E=20hm or as full metric meter number, ex: E=2 000m.

10-10-09, 02:57 PM	#5
pythos Grey Wolf Join Date: May 2005 Location: Somewhere over there Posts: 834 Downloads: 46 Uploads: 0	I was just about to say that sailor steve. Most stuff in Aerial navigation is done in Nautical miles. Though for some reason visibilities are done in statute, as is the radius of most navigation aids. Really outdated and can really mess some people up. Ships and other sea going vessels use nautical miles for measures, and speed is Knots per hour. From what I heard the term Knot came from measuring the amount of time a long rope with evenly spaced knots tied into it, took to unravel to its full extent, while a ship moved. Not sure how true that is, but if it is true, kinda ingenious in its simplicity.