Preparing a streamlined buoy for planting with Roberts Radio Current Meter.Inventor Elliott B. Roberts kneeling next to buoy.It was the first current system to telemeter current information.Buoy telemetry was an outgrowth of RAR radio-sono-buoy techn
3/20/2019 1:56:32 PM
Date: 1942
Credit: C&GS; Season's Report Roberts 1942-22
Location: Puget Sound, Washington
Subject: Charting
Subject: Tides
Subject: Tidal Currents