not these heads..... Sent from AOL Mobile Mail
On Saturday, May 12, 2018 Chuck Guzis via cctalk <cctalk@classiccmp.org> wrote: My guess was MADRE or NRL: https://www.wikiwand.com/en/Over-the-horizon_radar The timing would be right. Acoustic delay lines served the same purpose, but you couldn't have a mercury delay line in an airplane, practically speaking. --Chuck
