Yes. There are also magnetic anomaly detectors (MAD) and various wake detection approaches. Do these work all always? Probably not. But they work often enou

Yes. There are also magnetic anomaly detectors (MAD) and various wake detection approaches. Do these work all always? Probably not. But they work often enough to be researched and used. https://m.youtube.com/channel/UC9bMgCQyFNaMPsK9GtzM5dQ https://m.youtube.com/channel/UC9bMgCQyFNaMPsK9GtzM5dQ is a good starting point.