Celestial navigation - Revision history

Moleski: /* Links */

2011-09-12T22:39:05Z

Links

← Older revision		Revision as of 22:39, 12 September 2011
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	== Links ==		== Links ==
			* [http://e-archives.lib.purdue.edu/cdm4/results.php?CISOOP1=exact&CISOBOX1=eng&CISOFIELD1=CISOSEARCHALL&CISOOP2=all&CISOBOX2=Williams%2C++Clarence+S&CISOFIELD2=creato&CISOROOT=/earhart&t=s Purdue Archives: Clarence S. Williams charts prepared for various Earhart flights.]
	* [http://earchives.lib.purdue.edu/cdm4/item_viewer.php?CISOROOT=/earhart&CISOPTR=3629&CISOBOX=1&REC=3 "Flight analysis and course and distance data sheet, Honolulu, T.H., to Washington, by Great Circle to Oakland,"] prepared by Clarence S. Williams.		* [http://earchives.lib.purdue.edu/cdm4/item_viewer.php?CISOROOT=/earhart&CISOPTR=3629&CISOBOX=1&REC=3 "Flight analysis and course and distance data sheet, Honolulu, T.H., to Washington, by Great Circle to Oakland,"] prepared by Clarence S. Williams.
	* [http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/earhart&CISOPTR=2862&REC=6 "Flight analysis data, Howland Island, page 1,"] prepared by Clarence S. Williams.		* [http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/earhart&CISOPTR=2862&REC=6 "Flight analysis data, Howland Island, page 1,"] prepared by Clarence S. Williams.

Moleski: /* Links */

2011-09-11T23:42:24Z

Links

← Older revision		Revision as of 23:42, 11 September 2011
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	* [http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/earhart&CISOPTR=2862&REC=6 "Flight analysis data, Howland Island, page 1,"] prepared by Clarence S. Williams.		* [http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/earhart&CISOPTR=2862&REC=6 "Flight analysis data, Howland Island, page 1,"] prepared by Clarence S. Williams.
	* [http://earchives.lib.purdue.edu/cgi-bin/getimage.exe?CISOROOT=/earhart&CISOPTR=2861&DMSCALE=14.86915&DMWIDTH=750&DMHEIGHT=910.735527359&DMX=0&DMY=0&DMTEXT=&REC=1&DMTHUMB=0&DMROTATE=0 "Flight analysis data, Howland Island, page 2,"] prepared by Clarence S. Williams.		* [http://earchives.lib.purdue.edu/cgi-bin/getimage.exe?CISOROOT=/earhart&CISOPTR=2861&DMSCALE=14.86915&DMWIDTH=750&DMHEIGHT=910.735527359&DMX=0&DMY=0&DMTEXT=&REC=1&DMTHUMB=0&DMROTATE=0 "Flight analysis data, Howland Island, page 2,"] prepared by Clarence S. Williams.
			* [http://www.avweb.com/news/avtraining/IFR_bySunAndStars_200781-1.html "IFR by the Sun and Stars,"]] by Bill Castlen.

	<!-- Please leave this category marker at the bottom. You may add this article to other categories if you wish -->		<!-- Please leave this category marker at the bottom. You may add this article to other categories if you wish -->
	[[Category:Navigation]]		[[Category:Navigation]]

Moleski: /* Related articles */

2011-09-11T15:30:46Z

← Older revision		Revision as of 15:30, 11 September 2011
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	* [http://www.tighar.org/Projects/Earhart/Research/ResearchPapers/Worldflight/prepdepart.html The World Flight, First Attempt: Oakland to Honolulu--Preparations, Departure, Navigation en route.]		* [http://www.tighar.org/Projects/Earhart/Research/ResearchPapers/Worldflight/prepdepart.html The World Flight, First Attempt: Oakland to Honolulu--Preparations, Departure, Navigation en route.]
	* [[Air Navigation: State of the Art in 1937]]		* [[Air Navigation: State of the Art in 1937]]

			== Links ==
			* [http://earchives.lib.purdue.edu/cdm4/item_viewer.php?CISOROOT=/earhart&CISOPTR=3629&CISOBOX=1&REC=3 "Flight analysis and course and distance data sheet, Honolulu, T.H., to Washington, by Great Circle to Oakland,"] prepared by Clarence S. Williams.
			* [http://earchives.lib.purdue.edu/cdm4/document.php?CISOROOT=/earhart&CISOPTR=2862&REC=6 "Flight analysis data, Howland Island, page 1,"] prepared by Clarence S. Williams.
			* [http://earchives.lib.purdue.edu/cgi-bin/getimage.exe?CISOROOT=/earhart&CISOPTR=2861&DMSCALE=14.86915&DMWIDTH=750&DMHEIGHT=910.735527359&DMX=0&DMY=0&DMTEXT=&REC=1&DMTHUMB=0&DMROTATE=0 "Flight analysis data, Howland Island, page 2,"] prepared by Clarence S. Williams.

	<!-- Please leave this category marker at the bottom. You may add this article to other categories if you wish -->		<!-- Please leave this category marker at the bottom. You may add this article to other categories if you wish -->
	[[Category:Navigation]]		[[Category:Navigation]]

Moleski: /* Related articles */

2011-09-05T13:48:19Z

← Older revision		Revision as of 13:48, 5 September 2011
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	== Related articles ==		== Related articles ==
	* [http://tighar.org/Projects/Earhart/forum/FAQs/noonannav.htm "How Did Noonan Navigate?"]		* [http://tighar.org/Projects/Earhart/forum/FAQs/noonannav.htm "How Did Noonan Navigate?"]
	** [http://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxmcmVkaWVub29uYW58Z3g6NTNhNWVlMzY4YWZhMjc4ZA "Finding Tiny Islands from Speeding Planes"] by Fred Noonan.		** [http://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxmcmVkaWVub29uYW58Z3g6NTNhNWVlMzY4YWZhMjc4ZA "Finding Tiny Islands from Speeding Planes"] by Fred Noonan. [Dead link to Google books.]
	* [[Dead reckoning]].		* [[Dead reckoning]].
	* [[LOP\| Lines of position.]]		* [[LOP\| Lines of position.]]

Moleski: /* Offset method */

2011-09-05T13:46:36Z

Offset method

← Older revision		Revision as of 13:46, 5 September 2011
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	:For [[Noonan]] to have used the '''offset method''' to find [[Howland]] he would have had to know that [[RDF]] was not going to work when they were still far enough out to make the offset. [http://tighar.org/Publications/TTracks/12_2/logjam.html Earhart was still trying to use RDF as late as 1930Z (0800 local)] after they had already reached the advanced LOP.		:For [[Noonan]] to have used the '''offset method''' to find [[Howland]] he would have had to know that [[RDF]] was not going to work when they were still far enough out to make the offset. [http://tighar.org/Publications/TTracks/12_2/logjam.html Earhart was still trying to use RDF as late as 1930Z (0800 local)] after they had already reached the advanced LOP.

	:At 1912Z (0742 local time) [[Earhart]] said, "We must be on you but cannot see you...". If you are using the '''offset method''' there is no moment when you can say that you "must be" at your destination. Earhart probably meant that, according to the clock, they had now reached the advanced LOP and no island was in sight.		:At 1912Z (0742 local time) [[Earhart]] said, "We must be on you but cannot see you." If you are using the '''offset method''' there is no moment when you can say that you "must be" at your destination. Earhart probably meant that, according to the clock, they had now reached the advanced LOP and no island was in sight.

	Moreover, it is unlikely that [[Earhart]] and [[Noonan]] would have reported that they were [["We are on the line 157 337"\|"running the line north and south"]] if they had used the '''offset method.''' The whole point of the method is to fly so far off course from one's destination that when the [[LOP\|advanced LOP]] is reached, one knows which way to turn on the LOP. The last transmission heard is good evidence that they did not know whether they were north or south of [[Howland]] when they reached the [[LOP]].		Moreover, it is unlikely that [[Earhart]] and [[Noonan]] would have reported that they were [["We are on the line 157 337"\|"running the line north and south"]] if they had used the '''offset method.''' The whole point of the method is to fly so far off course from one's destination that when the [[LOP\|advanced LOP]] is reached, one knows which way to turn on the LOP. The last transmission heard is good evidence that they did not know whether they were north or south of [[Howland]] when they reached the [[LOP]].

Moleski at 06:01, 29 May 2011

2011-05-29T06:01:47Z

← Older revision		Revision as of 06:01, 29 May 2011
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			See also [[Air Navigation: State of the Art in 1937]].

	"Celestial navigation, also known as astronavigation, is a position fixing technique that was devised to help sailors cross the featureless oceans without having to rely on [[dead reckoning]] to enable them to strike land. Celestial navigation uses angular measurements (sights) between the horizon and a common celestial object. The Sun is most often measured. Skilled navigators can use the Moon, planets or one of 57 navigational stars whose coordinates are tabulated in nautical almanacs."[http://en.wikipedia.org/wiki/Celestial_navigation]		"Celestial navigation, also known as astronavigation, is a position fixing technique that was devised to help sailors cross the featureless oceans without having to rely on [[dead reckoning]] to enable them to strike land. Celestial navigation uses angular measurements (sights) between the horizon and a common celestial object. The Sun is most often measured. Skilled navigators can use the Moon, planets or one of 57 navigational stars whose coordinates are tabulated in nautical almanacs."[http://en.wikipedia.org/wiki/Celestial_navigation]

Rickerjones: /* Related articles */ Ad link to Air Navigation

2011-03-07T17:04:58Z

Related articles: Ad link to Air Navigation

← Older revision		Revision as of 17:04, 7 March 2011
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	* [["We are on the line 157 337"]]--last transmission.		* [["We are on the line 157 337"]]--last transmission.
	* [http://www.tighar.org/Projects/Earhart/Research/ResearchPapers/Worldflight/prepdepart.html The World Flight, First Attempt: Oakland to Honolulu--Preparations, Departure, Navigation en route.]		* [http://www.tighar.org/Projects/Earhart/Research/ResearchPapers/Worldflight/prepdepart.html The World Flight, First Attempt: Oakland to Honolulu--Preparations, Departure, Navigation en route.]
			* [[Air Navigation: State of the Art in 1937]]

	<!-- Please leave this category marker at the bottom. You may add this article to other categories if you wish -->		<!-- Please leave this category marker at the bottom. You may add this article to other categories if you wish -->
	[[Category:Navigation]]		[[Category:Navigation]]

Thomas: correct TTracks URL

2011-02-22T02:59:51Z

correct TTracks URL

← Older revision		Revision as of 02:59, 22 February 2011
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	:Back in AE's days nobody routinely tried to find islands by [[LOP]] navigation. Pan Am was the only airline flying the Pacific and they used [[RDF\|Radio Direction Finding (RDF)]] to navigate to their island destinations. For example, when a clipper flight departed California for Hawaii, it tracked outbound on a bearing from the Alameda station until it was out of radio range. The navigator then kept the flight more or less on course until it came within range of the Mokapu station which guided it in. [[Earhart]] and [[Noonan]] planned to find [[Howland]] by the same method.		:Back in AE's days nobody routinely tried to find islands by [[LOP]] navigation. Pan Am was the only airline flying the Pacific and they used [[RDF\|Radio Direction Finding (RDF)]] to navigate to their island destinations. For example, when a clipper flight departed California for Hawaii, it tracked outbound on a bearing from the Alameda station until it was out of radio range. The navigator then kept the flight more or less on course until it came within range of the Mokapu station which guided it in. [[Earhart]] and [[Noonan]] planned to find [[Howland]] by the same method.

	:For [[Noonan]] to have used the '''offset method''' to find [[Howland]] he would have had to know that [[RDF]] was not going to work when they were still far enough out to make the offset. [http://tighar.org/TTracks/12_2/logjam.html Earhart was still trying to use RDF as late as 1930Z (0800 local)] after they had already reached the advanced LOP.		:For [[Noonan]] to have used the '''offset method''' to find [[Howland]] he would have had to know that [[RDF]] was not going to work when they were still far enough out to make the offset. [http://tighar.org/Publications/TTracks/12_2/logjam.html Earhart was still trying to use RDF as late as 1930Z (0800 local)] after they had already reached the advanced LOP.

	:At 1912Z (0742 local time) [[Earhart]] said, "We must be on you but cannot see you...". If you are using the '''offset method''' there is no moment when you can say that you "must be" at your destination. Earhart probably meant that, according to the clock, they had now reached the advanced LOP and no island was in sight.		:At 1912Z (0742 local time) [[Earhart]] said, "We must be on you but cannot see you...". If you are using the '''offset method''' there is no moment when you can say that you "must be" at your destination. Earhart probably meant that, according to the clock, they had now reached the advanced LOP and no island was in sight.

Moleski at 14:19, 11 January 2011

2011-01-11T14:19:56Z

← Older revision		Revision as of 14:19, 11 January 2011
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	There is good evidence that [[Noonan]] did not use the offset method on the [[fatal flight]].		There is good evidence that [[Noonan]] did not use the offset method on the [[fatal flight]].

	;[[Ric Gillespie]], [~~https~~://tighar.org/smf/index.php/topic,169.msg879.html#msg879 Forum] 26 June 2010<nowiki>:</nowiki>		;[[Ric Gillespie]], [http://tighar.org/smf/index.php/topic,169.msg879.html#msg879 Forum] 26 June 2010<nowiki>:</nowiki>

	:Back in AE's days nobody routinely tried to find islands by [[LOP]] navigation. Pan Am was the only airline flying the Pacific and they used [[RDF\|Radio Direction Finding (RDF)]] to navigate to their island destinations. For example, when a clipper flight departed California for Hawaii, it tracked outbound on a bearing from the Alameda station until it was out of radio range. The navigator then kept the flight more or less on course until it came within range of the Mokapu station which guided it in. [[Earhart]] and [[Noonan]] planned to find [[Howland]] by the same method.		:Back in AE's days nobody routinely tried to find islands by [[LOP]] navigation. Pan Am was the only airline flying the Pacific and they used [[RDF\|Radio Direction Finding (RDF)]] to navigate to their island destinations. For example, when a clipper flight departed California for Hawaii, it tracked outbound on a bearing from the Alameda station until it was out of radio range. The navigator then kept the flight more or less on course until it came within range of the Mokapu station which guided it in. [[Earhart]] and [[Noonan]] planned to find [[Howland]] by the same method.
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	== Related articles ==		== Related articles ==
	* [http://tighar.org/Projects/Earhart/forum/FAQs/noonannav.htm "How Did Noonan Navigate?"]		* [http://tighar.org/Projects/Earhart/forum/FAQs/noonannav.htm "How Did Noonan Navigate?"]
	** [~~https~~://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxmcmVkaWVub29uYW58Z3g6NTNhNWVlMzY4YWZhMjc4ZA "Finding Tiny Islands from Speeding Planes"] by Fred Noonan.		** [http://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxmcmVkaWVub29uYW58Z3g6NTNhNWVlMzY4YWZhMjc4ZA "Finding Tiny Islands from Speeding Planes"] by Fred Noonan.
	* [[Dead reckoning]].		* [[Dead reckoning]].
	* [[LOP\| Lines of position.]]		* [[LOP\| Lines of position.]]

Moleski: /* Related articles */

2011-01-03T00:15:27Z

← Older revision		Revision as of 00:15, 3 January 2011
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	== Related articles ==		== Related articles ==
	* [http://tighar.org/Projects/Earhart/forum/FAQs/noonannav.htm "How Did Noonan Navigate?"]		* [http://tighar.org/Projects/Earhart/forum/FAQs/noonannav.htm "How Did Noonan Navigate?"]
			** [https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxmcmVkaWVub29uYW58Z3g6NTNhNWVlMzY4YWZhMjc4ZA "Finding Tiny Islands from Speeding Planes"] by Fred Noonan.
	* [[Dead reckoning]].		* [[Dead reckoning]].
	* [[LOP\| Lines of position.]]		* [[LOP\| Lines of position.]]