File:Using sextant swing.gif

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Using_sextant_swing.gif‎ (787 × 393 pixels, file size: 2.1 MB, MIME type: image/gif, looped, 28 frames, 19s)

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	This is a featured picture on Wikimedia Commons (Featured pictures) and is considered one of the finest images. This is a featured picture on the English language Wikipedia (Featured pictures) and is considered one of the finest images. If you have an image of similar quality that can be published under a suitable copyright license, be sure to upload it, tag it, and nominate it.
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This image has been assessed under the valued image criteria and 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.

This image was selected as a picture of the day for 16 June 2007(2007-06-16). It was captioned as follows:

English: Animation of the use of a marine sextant to measure the altitude of the sun.

Afrikaans: Werking van 'n marinesekstant wat die son se invalshoek meet

Беларуская: Схема карыстання марскім секстантам для вымярэння вугла падняцця Сонца над кругавідам.

Česky: Animace měření zeměpisné polohy lodi na moří pomocí sextantu

Deutsch: Animation zum Gebrauch eines Sextanten um 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 sextante para medir la altura del sol.

Français : Animation montrant l'usage d'un sextant de marine pour mesurer la hauteur du soleil.

Magyar: Animáció a Nap horizont feletti magasságának méréséről szextánssal.

Italiano: Esempio animato dell'uso di un sestante per 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

[edit] 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.

Deutsch: Animation, die den Gebrauch eines Sextanten zur Messung der Sonnenhöhe zeigt: (1) Ausrichten des Sextanten zum Horizont, (2) Schwenken des Indexspiegels, (3) Sonne und Horizont egalisieren, (4) Feinabstimmmung (5) Schwenken zur Verifizierung der Einstellung, (6) Ablesen der Messung.

Português: Animação demonstrando o uso do sextante náutico na medição da altura do Sol acima do horizonte

Date

April 2007(2007-04)

Source

Own work

Author

Joaquim Alves Gaspar

Permission
(Reusing this file)

I, the copyright holder of this work, hereby publish it under the following license:

This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.

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Under the following conditions:

attribution – You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work).
share alike – If you alter, transform, or build upon this work, you may distribute the resulting work only under the same or similar license to this one.

CC-BY-SA-2.5 truetrue

Other versions

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with captions in Afrikaans

This vector graphics image was created with CorelDRAW.

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

- 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.
- Press the clamp to release the index bar.
- Rotate the index bar to bring the reflected image of the Sun to the horizon.
- The lower limb of the Sun is now almost touching the horizon. Release the clamp and adjust the sun's position with the micrometer.
- Swing the sextant to verify the sun's position (adjust if necessary).
- Read the altitude at the arc scale and micrometer drum (about 40º 15').

Quality image

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File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Thumbnail	Dimensions	User	Comment
current	22:00, 2 November 2007		787 × 393 (2.1 MB)	Alvesgaspar
	18:45, 9 April 2007		787 × 393 (2.1 MB)	Alvesgaspar
	18:32, 9 April 2007		787 × 393 (2.1 MB)	Alvesgaspar
	23:02, 7 April 2007		787 × 393 (2.1 MB)	Alvesgaspar
	17:27, 7 April 2007		787 × 393 (2.1 MB)	Alvesgaspar
	17:08, 7 April 2007		787 × 393 (2.1 MB)	Alvesgaspar
	09:12, 5 April 2007		787 × 393 (2.05 MB)	Alvesgaspar
	20:28, 4 April 2007		787 × 393 (2.08 MB)	Alvesgaspar
	22:32, 3 April 2007		787 × 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)