Felix brings up a good question and I will throw my 3 cents in (Gone up due to inflation).
Sir John and PKv filled in a lot of blanks to your question so I will not try to not rehash their excellent commentary.
1) Triangulation would be the preferred method of tracking down the sender location. It would require manpower
to accomplish. At least two teams but three would be better. This is a consideration that .gov or the Blue Helmets
would have to weigh. "How important is it to find that one individual TXing info? How valuable is the info being TXed to
the enemy? Again, it is a manpower issue.
2) I do not know if drones have the ability or can attain the ability to do triangulation. I do not see why not. This would be a
force multiplier in the enemies favor. Again, it all depends on how important to the enemy it is to shut down someone TXing.
3) NC Scout once told me that while in Afghanistan, they use to monitor VHF frequencies which the Taliban used for coms. The
Taliban infrequently used codes like a Brevity code and certainly not a OTP code. The American translators monitored the
frequency's and then the QSO's were passed over to the allies G2 group (s). VERY SELDOM did they use triangulation with
the goal of dropping a hellfire in their laps. It was all about gathering intel. For assignations, they focused on cell use via cell
tower triangulation and or satellite and recon teams. So the intel gathered was more important then taking out 1-6 of the
enemy.
4) This is where encrypted messaging comes into play, along with using as little watts as absolutely necessary. TX/RX as quick
as you can and then beat feet. Using this method is where a directional antenna comes into play - TXing as well as RXing.
Omnidirectional, TXing is absolutely out of the question.
I have been on several training patrols where the patrol signalman first puts together a report in Brevity Code Format,
assembles a VHF or UHF directional antenna, and points the antenna in the direction of the TOC or a relay station. The
message is sent and then the Signalman listens for a received all code or a request on a clarification of a specific line item
from the report. If all goes well, the phone QSO lasts for under a minute. A digital coms lasts under 20 seconds. During this
period, not only do you TX info but RX info from the TOC too. Once completed, you beat feet from your TX site to an agreed
ahead of time rally point.
Again speed, low power, using a directional antenna, using an encrypted message, and then vacating the area of the
exchange is paramount.
There is a bit more involved but that is what it looks like at 10,000 feet.
5) Remember, to be a valuable radio operator, you do not need to RX. You can just listen and pass on information via 1:1
meetings, or dead drops. Dead drops are a whole new can of worms not worth going into here.
If you are a reader and like dry text material
HERE is the ARMY Manual on the subject of
Techniques of Radio Operations.
Better yet, NC Scout offers two great classes. Squad/Team field RTO, Basic and advanced. Both are outstanding and some of us here have taken them.
https://brushbeater.org/training-courses/I have taken several others and have adapted what I learned from all to what works best for me and my team. I do not want to elaborate here for obvious reasons.
Felix asks what time is it...I tell him how to build a clock.
Last further discussion on this subject would be best in the
Tri-cornered Hat Board. This board is only available to subscribers. On the average, this site receives ~7,000 hits a day. Obviously with only 600 subscribers and about 50 folks who are subscribers and check in daily, we need to maintain a PERESEC attempt on further delving into this subject.
Freedom Through self-Reliance 
