I work next to "Koninklijk Marine Kadettenkorps Afdeling Oostende" (Royal Marine Cadet Corps Ostend). They have an antenna that I've been wondering about for years now:
It is a vertical antenna, likely HF bands with four radials angled about 45 degrees from the vertical. So far, completely normal.
However, the verticals are pointing up. I've never seen this kind of antenna. For I long time I thought maybe someone just made a mistake while putting it together, but I can't honestly believe no one would have fixed it over time.
I am not proficient in any NEC program to simulate it myself. What is this kind of antenna used for?