Mariner's Astrolabe

A mariner’s astrolabe measures the angle of the Sun or a star above the horizontal line of reference. This one is possibly Portuguese, 1602.

Caption:
A mariner’s astrolabe measures the angle of the Sun or a star above the horizontal line of reference.
Type: Artifact
Image Date: 2012
Credit: National Museum of American History, Smithsonian Institution
Origin: National Museum of American History, Smithsonian Institution
Creator: Jaclyn Nash
JN2012-1287
Navigation Methods
 
A mariner’s astrolabe measures the angle of the Sun or a star above the horizontal line of reference.