An aircraft in my top 5…The Folland Gnat. Always thought this would make a great private plane…so small yet capable.
Deperming at Lamberts Point Naval Station in the middle of the Elizabeth River, Norfolk, Virginia. I was here for a year in 1967, demagnetizing mostly submarines. Some bigger ships too. The USS Intrepid (CV-11) in September 1943 and the USS Wasp (LHD-1) in August 1992. The station has been here for a very long time, with modernizations. I cooked on station.
It's also called "degaussing", and it is used to make the ships not trip magnetic mines. You wrap a long electric cable around and around and around around and around and around and around and around and around and around and around and around and around and around and around and around and around and around and around and around and around and around and around and around and around the ship and charge the cable. This removes the magnetic field a ship develops as it's built and sees service.
Just electricity. Degaussing/deperming stations are common in warship bases. The cables are electrically charged. It was a lucky find that set the RN on the degaussing routine. People on shore spotted a German plane drop a "bomb" that didn't explode when it hit the water. Investigation revealed its secrets.