You can broadcast on a timer, you can switch to a low frequency, low bandwidth transmitter, you can store locally and pick up the device later, etc. It all depends on the environment.

Or burst mode. That's been the speculated reasoning I've heard behind the USA's onerous POI restrictions on exported RTSAs.

That's probably the better option.

I found an article about the export restrictions here.

https://signalhound.com/news/how-we-implemexport-controls/

seems like it has to do with the fact it's guaranteed to intercept a signal all the way down to 1.2 uS