@Beefalo-Bart I know they're out there but I have driven around the edge of the water like 5 times scanning with the metal detector and scanning the water with my eyes and I still can't find the wings.
I guess I'll just have to mark this contract as "not completed".
And regarding the beep you mention: The metal detector is not the same as the seismic vibration unit, it doesn't beep when you get close.
After doing this and the scout car mission at least a half dozen times or so. I can go right to the locations and get the parts without the metal detector module lol. But I do remember that first time and driving around that cursed lake lol scanning and scanning .........