File:Sextant, Pocket Compass, Telescope (e7de5507-1dd8-b71b-0bd2-1dc0f1efe10b).JPG

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English: Sextant, Pocket Compass, Telescope
Photographer
English: NPS Photo
Title
English: Sextant, Pocket Compass, Telescope
Publisher
English: U.S. National Park Service
Description
English:

Sextant, pocket compass, and refracting telescope lay on a piece of leather.

A sextant was used to measure the angular distance between the moon and sun or a star, for determining longitude. The pocket compass was used to take bearings when it was impractical to use the circumferentor and when traveling on land. The refracting terrestrial telescope with an achromatic objective lens was used for daytime observations.

  • Keywords: navigation; william clark; compass; telescope; sextant; instruments; articles
Date Taken on 12 April 2017
Accession number
e7de5507-1dd8-b71b-0bd2-1dc0f1efe10b
Source
English: NPGallery
Permission
(Reusing this file)
Public domain This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information.
NPS Unit Code
InfoField
NPS

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current23:32, 15 May 2024Thumbnail for version as of 23:32, 15 May 20243,772 × 2,708 (3.37 MB)BMacZeroBot (talk | contribs)Batch upload (Commons:Batch uploading/NPGallery)

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