We think of radio navigation and direction finding as something fairly modern. However, it might surprise you that direction finding is nearly as old as radio itself. In 1888, Heinrich Hertz noted ...

When combined with another personal beacon, the Vecta2 Direction Finder from ACR Electronics can scan for and locate lost survivors or crew members (who are lost by land or sea) with pinpoint accuracy ...

ADF (Automatic Direction Finder) radio waves are propagated as ground waves and/or sky waves. Problems associated with ADF are inherent in the frequency range that ...

AT a meeting of the Wireless Section of the Institution of Electrical Engineers held on April 5, two papers were read describing recent research carried out at H.M. Signal School in the development of ...