Roberts Radio Current Meter ready to be deployed.This meter was invented by Elliott B. Roberts.It was the first current system to telemeter current information.Buoy telemetry was an outgrowth of RAR radio-sono-buoy technology.Tests conducted on LESTE
3/20/2019 1:56:31 PM
Date: 1942
Credit: C&GS; Season's Report Roberts 1942-22
Location: Puget Sound, Washington
Subject: Charting
Subject: Tides
Subject: Tidal Currents