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![Graphic demonstrating Radio Acoustic Ranging (RAR) theb2242.jpg Graphic demonstrating Radio Acoustic Ranging (RAR)](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2242.jpg?itok=lKX4_Fi9)
Description
Graphic demonstrating Radio Acoustic Ranging (RAR).Developed in 1923, RAR was the first non-visual navigation system.Combined velocity of sound in water with radio to obtain fix. (Image credit: NOAA Central Library)
Credit
NOAA Central Library
Display Date
1931
Location
Georges Bank
Collection
Historic Coast & Geodetic Survey
Nautical Charting
Navigation
Radio Acoustic Ranging
Keywords
Charting
Navigation
Electronic
Radio-Acoustic Ranging