There certainly are methods. This is often called "fox hunting" https://en.wikipedia.org/wiki/Transmitter_hunting https://en.wikipedia.org/wiki/Transmitter_hunt

There certainly are methods. This is often called "fox hunting" https://en.wikipedia.org/wiki/Transmitter_hunting https://en.wikipedia.org/wiki/Transmitter_hunting You can build an antenna with a cardiod pattern, which has a wide range but a very deep, narrow null at one end. When you see the signal strength dip off, the transmitter has to be aligned with the null (sort of, there are also multipath issues to consider) But, doing this requires you can move freely to track the transmitter. Hunting a transmitter on Russian soil by non-Russian entities might not be viewed very kindly :)