About: Gee-H (navigation)

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Gee-H, sometimes written G-H or GEE-H, was a radio navigation system developed by Britain during World War II to aid RAF Bomber Command. The name refers to the system's use of the earlier Gee equipment, as well as its use of the "H principle" or "twin-range principle" of location determination. Its official name was AMES Type 100. Gee-H was adapted by RCA into the US wartime SHORAN system with improved accuracy. The same basic concept remains in widespread use today as the civilian DME system.

Attributes	Values
rdfs:label	Gee-H (navigation) (en)
rdfs:comment	Gee-H, sometimes written G-H or GEE-H, was a radio navigation system developed by Britain during World War II to aid RAF Bomber Command. The name refers to the system's use of the earlier Gee equipment, as well as its use of the "H principle" or "twin-range principle" of location determination. Its official name was AMES Type 100. Gee-H was adapted by RCA into the US wartime SHORAN system with improved accuracy. The same basic concept remains in widespread use today as the civilian DME system. (en)
foaf:depiction
dcterms:subject	World War II British electronics Military equipment introduced from 1940 to 1944 Radio navigation
Wikipage page ID	1409379 (xsd:integer)
Wikipage revision ID	1112365602 (xsd:integer)
Link from a Wikipage to another Wikipage	Envelope (waves) List of World War II electronic warfare equipment World War II British electronics Battle of the Beams De Havilland Mosquito Dead reckoning Radar Gee (navigation) Time base generator English Electric Canberra Great Britain Morse code Luftwaffe Sightline Walmer Distance measuring equipment Transponder Air Ministry Experimental Station Military equipment introduced from 1940 to 1944 Air Ministry Düsseldorf Radio direction finder Radio receiver Radio navigation Chaff (radar countermeasure) Mannesmann Bomber Bomber stream Oboe (navigation) Operation Overlord RAF Bomber Command RCA Military history of the United States during World War II Lorenz beam Oscilloscope No. 218 Squadron RAF Transmitter Y-Gerät (navigation) Radio navigation SHORAN Operation Glimmer Target marker Pathfinder Force Knickebein
Link from a Wikipage to an external page	http://jproc.ca/hyperbolic/gee.html https://www.scribd.com/doc/35039272/MIT-Radiation-Lab-Series-V3-Radar-Beacons http://www.radarpages.co.uk/mob/navaids/geeh/geeh1.htm
sameAs	Gee-H (navigation) Gee-H (navigation) Gee-H (navigation)
dbp:wikiPageUsesTemplate	dbt:RAF_WWII_Strategic_Bombing dbt:Center dbt:Cite_book dbt:Cite_encyclopedia dbt:Cite_journal dbt:Cite_web dbt:Cvt dbt:Refbegin dbt:Refend dbt:Reflist dbt:Sfn dbt:Short_description
thumbnail	wiki-commons:Special:FilePath/Avro_Lancaster_-_Waddington_-_Aircraft_of_the_Royal_Air_Force_in_the_Second_World_War_1939-1945_MH6448.jpg?width=300
has abstract	Gee-H, sometimes written G-H or GEE-H, was a radio navigation system developed by Britain during World War II to aid RAF Bomber Command. The name refers to the system's use of the earlier Gee equipment, as well as its use of the "H principle" or "twin-range principle" of location determination. Its official name was AMES Type 100. Gee-H was used to supplant the Oboe bombing system which worked along similar lines. By measuring and keeping a fixed distance to a radio station, the bomber could navigate along an arc in the sky. The bombs were dropped when they reached a set distance from a second station. The main difference between Oboe and Gee-H was the location of the equipment; Oboe used large displays in ground stations to take very accurate measurements but could only direct one aircraft at a time. Gee-H used much smaller systems onboard aircraft and while somewhat less accurate, could direct as many as 80 aircraft at a time. Gee-H entered service in October 1943 and first used successfully in November against the Mannesmann steel works at Düsseldorf on the night of 1/2 November, when about half of the sets failed leaving only 15 aircraft to bomb the factory. Gee-H remained in use throughout the war, although it was subject to considerable jamming from the Germans. It also remained a standard fixture of post-war RAF aircraft like the English Electric Canberra. Gee-H was adapted by RCA into the US wartime SHORAN system with improved accuracy. The same basic concept remains in widespread use today as the civilian DME system. (en)
gold:hypernym	System
prov:wasDerivedFrom	wikipedia-en:Gee-H_(navigation)?oldid=1112365602&ns=0
page length (characters) of wiki page	17836 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Gee-H_(navigation)
is Link from a Wikipage to another Wikipage of	1943 in aviation 1944 in aviation Bombing of Friedrichshafen in World War II Edward Sismore English Electric Canberra Loran-C True-range multilateration UB.109T Distance measuring equipment No. 3 Group RAF Luftnachrichten Abteilung 350 RAF raid on La Caine (1944) VOR/DME V bomber Radio navigation G-H (navigation)
is Wikipage redirect of	G-H (navigation)
is foaf:primaryTopic of	wikipedia-en:Gee-H_(navigation)

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