pl23_theb2242.jpg
![Graphic demonstrating Radio Acoustic Ranging (RAR) theb2242.jpg Graphic demonstrating Radio Acoustic Ranging (RAR)](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2242.jpg)
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.
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