3 ms·
If (when) the GPS fails you can do pretty well with radar and a depth sounder.
by _moof 3y ago
If (when) the GPS fails you can do pretty well with radar and a depth sounder.
- bookofjoe 3y agohttps://www.thevintagenews.com/2017/02/23/depth-sounding-techniques-that-preceded-the-modern-day-sonar-technology/?chrome=1&D2c=1&A1c=1 https://www.thevintagenews.com/2017/02/23/depth-sounding-tec...