Towing a magnetic field generator behind a boat or aircraft is a common minesweeping technique. The generator is usually mounted on a floating 'sled' to maximis

Towing a magnetic field generator behind a boat or aircraft is a common minesweeping technique. The generator is usually mounted on a floating 'sled' to maximise depth capability, but aircraft-mounted degaussing coils were used in minesweeping by the British in WWII. https://en.m.wikipedia.org/wiki/Minesweeping https://en.m.wikipedia.org/wiki/Minesweeping