Archive
of
Collections
Details and Image
Type
Model No.
Maker
Country
Construction
Material
Date
Scale Length
Area of Use
Disk
Time-Distance-Speed Computer
American Hydromath Company for the U.S. Maritime Commission
USA
Plastic
c. 1944
Dia. = 15.2 cm
Nautical
Notes:
"Used to calculate time, distance and speed. Includes scales to include propeller pitch and revolutions in the calculations."
Image 1
Image 2
Image 3
Image 4
Image 5
Image 6
