Compass - Revision history

DavidB4: trimming category list

2020-01-06T19:11:35Z

trimming category list

DavidB4: wikilink

2019-07-09T21:57:56Z

wikilink

DavidB4-bot: /* External links */HTTP --> HTTPS [#1], replaced: http://www.youtube.com → https://www.youtube.com

2018-09-26T14:55:20Z

External links: HTTP --> HTTPS [#1], replaced: http://www.youtube.com → https://www.youtube.com

DavidB4: a tad more (1st person) TAR

2017-03-07T18:17:48Z

a tad more (1st person) TAR

SamHB: Still removing TAR, years later! And remove not-family-friendly abbreviation.

2017-03-07T17:54:19Z

Still removing TAR, years later! And remove not-family-friendly abbreviation.

DavidB4: /* External links */ link tweak

2016-12-27T17:18:24Z

External links: link tweak

DavidB4-bot: clean up & uniformity

2016-06-28T00:30:19Z

clean up & uniformity

TheAmericanRedoubt: /* See Also */

2014-12-05T22:26:27Z

TheAmericanRedoubt: Slightly expanded the article, Added hyperlinks, Proof read and Categories

2014-12-05T22:25:07Z

Slightly expanded the article, Added hyperlinks, Proof read and Categories

Snowy at 18:33, October 26, 2012

2012-10-26T18:33:43Z

← Older revision		Revision as of 19:11, January 6, 2020
Line 73:		Line 73:
	[[Category:Navigation]]		[[Category:Navigation]]
	[[Category:Geography]]		[[Category:Geography]]
−	~~[[Category:Survivalism]]~~
−	~~[[Category:Travel]]~~

@@ Line 1: / Line 1: @@
 The term '''compass''' can refer to a navigational tool which points in a fixed direction, allowing travelers to find their way by inferring other directions and paths through the process of ''orienteering''.  When used alone the term usually refers to a magnetic compass. The plural ''compasses'' can also refer to a device used for drawing circles.
-Magnetic compasses rely upon [[magnet]]ized pieces of metal, typically floating in liquid to ensure low [[friction]]. These  align themselves with the Earth's magnetic field lines which point at the Earth's magnetic north pole. Magnetic field lines vary from true north (pointing to the geographic north pole) and thus must be adjusted according to information usually found on a map or chart. Maps and charts have a compass rose printed with the deviation from true north noted for the area of coverage of the map. Deviation often occurs due to large mineral deposits which occur in the area of interest.
+Magnetic compasses rely upon [[magnet]]ized pieces of metal, typically floating in liquid to ensure low [[friction]]. These  align themselves with the Earth's magnetic field lines which point at the Earth's magnetic north pole. Magnetic field lines vary from true north (pointing to the geographic north pole) and thus must be adjusted according to information usually found on a map or chart. Maps and charts have a [[compass rose]] printed with the deviation from true north noted for the area of coverage of the map. Deviation often occurs due to large mineral deposits which occur in the area of interest.
 Deviation from true north can also occur due to the presence of nearby large metal objects, such as ships at sea. At sea, this additional magnetic deviation is tracked, logged, and factored in to reading a magnetic compass in order to determine true north. In an aircraft the aircraft's movement can affect a compass, causing it to give inaccurate readings during turns and other maneuvers.

@@ Line 67: / Line 67: @@
 * [http://www.orienteering.org/ International Orienteering Federation]
 * [http://www.geocaching.com/ www.geocaching.com]
-* [http://www.youtube.com/watch?v=v58-RqssqUc YouTube.com:  Orienteering, USOF style]
+* [https://www.youtube.com/watch?v=v58-RqssqUc YouTube.com:  Orienteering, USOF style]
 * https://www.amazon.com/Suunto-Arrow-6-Orienteering-Compass/dp/B003JYVMJC

@@ Line 9: / Line 9: @@
 Compasses are one of the two most essential pieces of navigation gear that one should carry, the other being a [[map]], though [[GPS]] devices are supplanting both.
-Few things are more important than knowing where you are and where you're going and the compass helps you to do both. In selecting a compass there many types with many different features to consider, some of them are novelties while others are tremendous conveniences. There are several basic types of compass, and some compasses fall under more than one type.
+In selecting a compass there many types with many different features to consider, some of them are novelties while others are tremendous conveniences. There are several basic types of compass, and some compasses fall under more than one type.
 ==Types of Compass==

@@ Line 7: / Line 7: @@
 Magnetic compasses were first invented as a device for [[divination]] as early as the [[Chinese]] [[Han Dynasty]] (since about 206 BC).<ref>{{cite book|last=Merrill|first=Ronald T.|title=The Earth's magnetic field: Its history, origin and planetary perspective|year=1983|publisher=Academic press|location=San Francisco|isbn=0-12-491242-7|page=1|edition=2nd printing|author2=McElhinny, Michael W.}}</ref> Magnetic compasses were in early use by [[Portugal|Portuguese]] explorers in the [[Age of Exploration]].
-Compasses are one of the two most essential pieces of navigation gear that one should carry, the other being a [[map]]. [[GPS]] devices and [[cell phone]]s with [[Google]] Maps may breakdown or run out of [[battery|batteries]] during an [[emergency]], [[disaster]] or a [[Post Apocalyptic World]] - [[SHTF]] - [[TEOTWAWKI]] event. Also the sun isn't always shining, and it takes a great deal of time and effort to learn to stellar navigation, however a map and compass will continue to work until your break or lose them.
+Compasses are one of the two most essential pieces of navigation gear that one should carry, the other being a [[map]], though [[GPS]] devices are supplanting both.
 Few things are more important than knowing where you are and where you're going and the compass helps you to do both. In selecting a compass there many types with many different features to consider, some of them are novelties while others are tremendous conveniences. There are several basic types of compass, and some compasses fall under more than one type.
@@ Line 41: / Line 41: @@
 ==See also==
-* [[Map]] and Compass
+* [[Map]]
 * [[Orienteering]]
 * [[Geocaching]]
 * [[GPS]]
 ==References==
-{{Reflist|2}}
+{{Reflist}}
 ==Bibliography==

@@ Line 61: / Line 61: @@
 ==External links==
-* [http://msi.nga.mil/MSISiteContent/StaticFiles/HoMCA.pdf] Handbook of Magnetic Compass Adjustment.
+* [http://msi.nga.mil/MSISiteContent/StaticFiles/HoMCA.pdf Handbook of Magnetic Compass Adjustment]
 * [http://www.magnet.fsu.edu/mediacenter/slideshows/compass/index.html How to Make a Compass] Audio slideshow from the National High Magnetic Field Laboratory
 * Paul J. Gans, [http://scholar.chem.nyu.edu/tekpages/compass.html The Medieval Technology Pages: Compass]

@@ Line 45: / Line 45: @@
 * [[Geocaching]]
 * [[GPS]]
-* [[Survivalist retreat|Bugout via Map]]
+* [[Survivalist retreat|Bugout via Map and Compass]]
 * [[:Category:Survivalism|Survivalism]]

@@ Line 5: / Line 5: @@
 Deviation from true north can also occur due to the presence of nearby large metal objects, such as ships at sea. At sea, this additional magnetic deviation is tracked, logged, and factored in to reading a magnetic compass in order to determine true north. In an aircraft the aircraft's movement can affect a compass, causing it to give inaccurate readings during turns and other maneuvers.
-A gyrocompass, also known as a ''direction indicator'', is another instrument designed to indicate north. They are mainly used in aircraft, where the change in atttude of an aircraft can affect the direction of a normal magnetic compass. The principle of a gyrocompass relies upon a rapidly spinning wheel (usually run electrically) which maintains its original orientation. Due to the [[law of conservation of angular momentum]], a gyrocompass can be set to point to true north when it is initialized, and it will continue to point to true north. Gyrocompasses will drift over time, and therefore need to be resynchronized with a magnetic compass at regular intervals.
+Magnetic compasses were first invented as a device for [[divination]] as early as the [[Chinese]] [[Han Dynasty]] (since about 206 BC).<ref>{{cite book|last=Merrill|first=Ronald T.|title=The Earth's magnetic field: Its history, origin and planetary perspective|year=1983|publisher=Academic press|location=San Francisco|isbn=0-12-491242-7|page=1|edition=2nd printing|author2=McElhinny, Michael W.}}</ref> Magnetic compasses were in early use by [[Portugal|Portuguese]] explorers in the [[Age of Exploration]].
-Magnetic compasses were in early use by [[Portugal|Portuguese]] explorers in the [[Age of Exploration]].
+Compasses are one of the two most essential pieces of navigation gear that one should carry, the other being a [[map]]. [[GPS]] devices and [[cell phone]]s with [[Google]] Maps may breakdown or run out of [[battery|batteries]] during an [[emergency]], [[disaster]] or a [[Post Apocalyptic World]] - [[SHTF]] - [[TEOTWAWKI]] event. Also the sun isn't always shining, and it takes a great deal of time and effort to learn to stellar navigation, however a map and compass will continue to work until your break or lose them.
 [[Category:Navigation]]
-[[Category:Inventions]]
+[[Category:Geography]]