Image:Using sextant swing.gif

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Using_sextant_swing.gif‎ (787 × 393 pixels, file size: 2.1 MB, MIME type: image/gif) This is a file from the Wikimedia Commons. The description on its description page thereis shown below. Commons is a freely licensed media file repository. You can help.

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This image was selected as picture of the dayon the English Wikipediafor August 30, 2007.

Summary

Description English: Animation of the use of a marine sextant to measure the altitude of the sun Français : Animation montrant l'usage d'un sextant de marine pour mesurer la hauteur du soleil. Légende: (1) pointer le sextant sur l'horizon, (2) libérer le frein de la barre d'index, (3) Mener le soleil à l'horizon, (4) freiner la barre d'index, ajuster finement la lecture à l'aide de la molette. (5) basculer l'appareil pour vérifier l'alignement, (6) lire l'angle mesuré. Português: Animação demonstrando o uso do sextante náuticona medição da altura do Sol acima do horizonte Source

own work

Date

April 2007

Author

Joaquim Alves Gaspar

Permission
(Reusing this image)

below

Other versions Image:Using sextant.gif(no captions), Image:Marine sextant.svg

This is a featured pictureon Wikimedia Commons: it is consideredone of our finest images.
This is a featured pictureon English Wikipedia and is consideredone of the finest images.
If you have an image of similar quality that can be published under a suitable copyright license, be sure to uploadit, tagit, and nominate it.

This image was selected as a picture of the dayfor June 16, 2007. It was captioned as followed: English: Animation of the use of a marine sextant to measure the altitude of the sun. Беларуская: Схема карыстання марскім секстантам для вымярэння вугла падняцця Сонца над кругавідам. Česky: Animace měření zeměpisné polohy lodi na moří pomocí sextantuDeutsch: Animation zum Gebrauch eines Sextantenum den Winkel der Sonne über dem Horizont zu messen. English: Animation of the use of a marine sextant to measure the altitude of the sun. Español: Animación del uso de un sextantepara medir la altura del sol. Français : Animation montrant l'usage d'un sextantde marine pour mesurer la hauteur du soleil. Magyar: Animáció a Nap horizontfeletti magasságának méréséről szextánssal. Italiano: Esempio animato dell'uso di un sestanteper misurare l'altitudine del sole. 日本語: 海上で六分儀を使用して太陽の高度を測定する手順のアニメーション Nederlands: Engelstalige animatie van het gebruik van een sextantvoor het meten van de hoogte van de zonPolski: Animacja zasady działania i korzystania z sekstantuPortuguês: Animação sobre o uso do sextantenáutico para medir a altura do Sol. Română: Animaţie care ilustrează utilizarea unui sextant pentru măsurarea altitudinii soarelui. Русский: Наглядный пример использования морского секстантадля измерения угла возвышения Солнцанад горизонтом. Slovenčina: Animácia merania zemepisnej polohy lodi na mori pomocou sextantu. Svenska: Animering av hur en sextantanvänds för att mäta solenshöjd över horisonten. ‪中文(简体)‬: 用六分仪测量太阳高度的动画。 ‪中文(繁體)‬: 運用航海六分儀來量度太陽高度的動畫

This is a valued imageon Wikimedia Commons. The image has been assessed under the valued image criteriaand is considered the most valued image on Commons within the scope: The use of a marine sextant at sea. You can see its nomination at Commons:Valued image candidates/Using sextant swing.gif.

Explanation of frames (also see Image:Marine sextant.svg)

1 - Point the sextant to the horizon in the direction of the Sun. The horizon is visible at left, through the glass, and also at right, reflected by the two mirrors. The index arm is at the zero position.

2 - Press the clamp to release the index bar.

3 - Rotate the index bar to bring the reflected image of the Sun to the horizon.

4 - The lower limb of the Sun is now almost touching the horizon. Release the clamp and adjust the sun's position with the micrometer.

5 - Swing the sextant to verify the sun's position (adjust if necessary).

6 - Read the altitude at the arc scale and micrometer drum (about 40º 15').

Licensing

I, the copyright holder of this work, hereby publish it under the following license:
This fileis licensed under the Creative Commons Attribution ShareAlike 2.5 License. In short: you are free to share and make derivative works of the file under the conditions that you appropriately attribute it, and that you distribute it only under a license identical to this one. Official license

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Date/TimeDimensionsUserComment current22:00, 2 November 2007787×393 (2.1 MB)Alvesgaspar 18:45, 9 April 2007787×393 (2.1 MB)Alvesgaspar 18:32, 9 April 2007787×393 (2.1 MB)Alvesgaspar 23:02, 7 April 2007787×393 (2.1 MB)Alvesgaspar 17:27, 7 April 2007787×393 (2.1 MB)Alvesgaspar 17:08, 7 April 2007787×393 (2.1 MB)Alvesgaspar 09:12, 5 April 2007787×393 (2.05 MB)Alvesgaspar 20:28, 4 April 2007787×393 (2.08 MB)Alvesgaspar 22:32, 3 April 2007787×393 (2.11 MB)Alvesgaspar ({{Information |Description=Animation of the use of a marine sextant to measure the altitude of the sun |Source=own work |Date=April 2007 |Author=Joaquim Alves Gaspar|Permission=below |other_versions=Image:Using_sextant_swing.gif)