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RADIO ACOUSTIC RANGING
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Coast-Geodetic-Survey
Nautical Charting
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Radio Acoustic Ranging
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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.
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Planting a hydrophone anchor with the cable attached.On the GUIDE.Hydrophone would pick up sound from RAR TNT explosion.
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Cable drum being pulled by horses across dunes.Cable lead to offshore hydrophone for Radio Acoustic Ranging.On the GUIDE
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Electronics setup for Radio Acoustic Ranging shore station.Navigation station for the GUIDE
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Planting anchor for Radio Acoustic Ranging hydrophone.Must have been warm - note bare foot helping push anchor away from ship
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A new type of hydrophone block for Radio Acoustic Ranging.On the GUIDE
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Transferring the hydrophone block and cable to launch for planting.Radio acoustic ranging operations on the GUIDE
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Launch laying the cable from hydrophone to the shore station.Radio acoustic ranging operations on the GUIDE
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Shore Radio Acoustic Ranging Station on San Clemente Island.Radio acoustic ranging operations on the GUIDE
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Radio operator at work at Radio Acoustic Ranging shore station KGHS.Radio acoustic ranging operations on the SURVEYOR
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The first Odessey Protractor.This instrument was used to plot intersecting ranges from two RAR stations.Invented while Herman Odessey attached to DISCOVERER.Variations of this instrument were used for plotting positions for over 60 years
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Radio Acoustic Ranging bomb making.TNT bombs were sound source for RAR.RAR work on OCEANOGRAPHER
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Radio Acoustic Ranging bomb making.TNT bombs were sound source for RAR.RAR work on OCEANOGRAPHER
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Radio Acoustic Ranging - igniting the bomb and timing fuse.TNT bombs were sound source for RAR.RAR work on OCEANOGRAPHER
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Timing the fuse on a quart bomb during RAR operations.TNT bombs were sound source for RAR.RAR work on OCEANOGRAPHER
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Quart bombs exploding during RAR operations.TNT bombs were sound source for RAR.RAR work on OCEANOGRAPHER
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A schematic view of RAR and echo-sounding.Diagram in public information brochure
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The Launch PRATT - an RAR hydrophone boat.Worked as station boat while HYDROGRAPHER conducted sounding operations
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A sono-radio-buoy developed to eliminate need for station boats.RAR operations in the Gulf of Mexico.Forerunner of Anti-submarine warfare sonobuoys
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Electronics package of sono-radio-buoy for RAR.This instrument was developed by Almon Vincent on the GUIDE.Forerunner of Anti-submarine warfare sonobuoys
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