Rude Star Finder (21020-B)

Catalogue number:
PH*315071.2

Inscriptions:
"H.O. NO. 2102-B / HYDROGRAPHIC OFFICE / RUDE / STAR FINDER AND IDENTIFIER / (WITH HYDROGRAPHIC OFFICE MODIFICATIONS) PRICE $1.00 / Published at the Hydrographic Office, Washington, D.C. Oct. 1940 under the authority of THE SECRETARY OF THE NAVY"

Dimensions:
diameter 8 inches

Discussion:
This consists of a white plastic planisphere with the northern sky on one side and the southern on the other, seven clear plastic templates centered at 10^o intervals of latitude, and a cardboard container. The United States Hydrographic Office transferred it to the Smithsonian in 1957.

Ref: G. T. Rude, Star Finder and Identifier," U.S. patent #1,401,446

H. M. Jensen, et. al., "Navigational Instrument," U.S. patent #1,919,222

Further Information:

Rude
Star Finder