alb3811265

Alidade, Navigational Tool

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Title: Alidade, Navigational Tool

Caption: An alidade (archaic forms include alhidade, alhidad, alidad) is an instrument for taking bearings, consisting of two arms revolving around a circular brass plate or dial marked with points and degrees of the compass. It is secures on top of the binnacle hood and set to the ship's course, so that any bearing given by it will represent the magnetic bearing as by the compass beneath.

Category: Science: History

Credit: Album / Science Source / New York Public Library

Releases: ? Model Release: No - ? Property Release: No
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Image size: 3468 × 3075 px | 30.5 MB

Print size: 29.4 × 26.0 cm | 1365.4 × 1210.6 in (300 dpi)

Keywords: ALHIDAD • ALHIDADE • ALIDAD • ART • ARTWORK • BEARINGS • BINNACLE HOOD • BW • CIRCULAR BRASS DIAL • CIRCULAR BRASS PLATE • COMPASS • DRAWING • HISTORIC • HISTORICAL • HISTORY • ILLUSTRATION • ILLUSTRATIONS • ILUSTRATION • INSTRUMENT • MAGNETIC BEARING • NAVIGATION • NAVIGATIONAL • POINTS DEGREES • SCIENCE: HISTORY • SHIPS COURSE • TOOL • TWO ARMS