An anti-submarine indicator loop was a device used to detect submarines and surface vessels using specially designed submerged cables connected to a galvanometer.
https://en.wikipedia.org/wiki/Galvanometer
https://en.wikipedia.org/wiki/Frog_galvanoscope
https://en.wikipedia.org/wiki/Galvanometer#/media/File:A_moving_coil_galvanometer._Wellcome_M0016397.jpg
...off on a tangent now, dazzlenation...are we still on 'nigel' here?....see previous posts....go figure.
No comments:
Post a Comment