File:Opérateur radio-navigant-colorized.jpg
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Summary[edit]
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Français : Opérateur radiotelegraphiste navigant, les communications aéronautiques en radiotélégraphie étaient dans la bande comprise de 325 kHz à 405 kHz. En vol une antenne pendante longue de 120 mètres à 450 mètres était déroulée pour établir les communications radios. Proche du sol cette antenne est rembobinée sur un touret à manivelle. À l'extrémité de l'antenne pendante un plomb de lestage porte l'indicatifs radio de l'aéronef. Et l'antenne fixe sur le fuselage est utilisé en permanence.
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| Date | between 1920 and 1930 |
| Source | Own work |
| Author | inconnue, anonyme. Unknown, colorisation F1jmm |
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This image (or other media file) is in the public domain because its copyright has expired and its author is anonymous.
This applies to the European Union and those countries with a copyright term of 70 years after the work was made available to the public and the author never disclosed their identity. Important: Always mention where the image comes from, as far as possible, and make sure the author never claimed authorship. |
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Note: In Germany and possibly other countries, certain anonymous works published before July 1, 1995 are copyrighted until 70 years after the death of the author. See Übergangsrecht. Please use this template only if the author never claimed authorship or their authorship never became public in any other way. If the work is anonymous or pseudonymous (e.g., published only under a corporate or organization's name), use this template for images published more than 70 years ago.
For a work made available to the public in the United Kingdom, please use Template:PD-UK-unknown instead.
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: picture manager bright. Modifications made by F1jmm.
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 | This file is an original and may be obsolete for general use, but is kept for historical or archival use. As such, it should not be modified or deleted except to correct upload or technical errors. Any modified versions or replacements of this image should be uploaded with a different file name. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 22:32, 1 May 2020 | | 480 × 640 (76 KB) | F1jmm (talk | contribs) | Uploaded own work with UploadWizard |
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- Usage on fr.wiktionary.org
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