PBY-5A Catalina with ore-finding magnetometers.
https://diqn32j8nouaz.cloudfront.net...1_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...2_fullsize.jpg
https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
Previously:
https://www.homemadetools.net/forum/...713#post159551
https://www.homemadetools.net/forum/...277#post134903
https://www.homemadetools.net/forum/...2981#post97744
https://www.homemadetools.net/forum/...393#post224772
https://www.homemadetools.net/forum/...665#post205927
