File:AN APN-4 display in Consolidated Canso.png

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Summary

Description
English: This image shows an AN/APN-4 LORAN display unit mounted in a Consolidated Canso (PBY) aircraft. LORAN systems worked by comparing the time-of-arrival of signals sent from two widely-separated radio stations on an oscilloscope display like the APN-4 shown here. The operator would use the controls at the bottom to align the signals on the screen, and then measure the time difference between them. These delays were printed on maps, which were then used to determine the location of the aircraft.
Date
Source http://data2.archives.ca/ap/a/a064915-v8.jpg
Author Unknown RCAF photographer, Collections Canada MIKAN no. 3583272

Licensing

Public domain
This Canadian work is in the public domain in Canada because its copyright has expired due to one of the following:
1. it was subject to Crown copyright and was first published more than 50 years ago, or

it was not subject to Crown copyright, and

2. it is a photograph that was created prior to January 1, 1949, or
3. the creator died prior to January 1, 1972.

You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that this work might not be in the public domain in countries that do not apply the rule of the shorter term and have copyright terms longer than life of the author plus 50 years. In particular, Mexico is 100 years, Jamaica is 95 years, Colombia is 80 years, Guatemala and Samoa are 75 years, Switzerland and the United States are 70 years, and Venezuela is 60 years.


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20 May 1944

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1057c1f4982258efdf86c478fbe391396b782f7f

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Date/TimeThumbnailDimensionsUserComment
current18:32, 2 December 2014Thumbnail for version as of 18:32, 2 December 20141,000 × 1,269 (1,007 KB)Maury MarkowitzUser created page with UploadWizard
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