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This apparatus consists of a movable plate marked with compass bearings, set in a stand. The observer sets the plate to correspond to the standard compass, and then sights across it in determining the compass bearings of points ashore from which he wishes to learn his exact position.

Auteur

Ships of the seven seas
By Hawthorne Daniel
Contributor: Franklin D Roosevelt
Published 1925
Available from gutenberg.org or archive.org

Ajoutée le

Samedi 10 Février 2024

Dimensions

1000*733

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Albums

• Technology / Transport / Water

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