We record and store event logs for both Bradley and Heli. You can find these logs printed to your console after they're destroyed. If you don't see anything, an admin can pull them for you.
For our modded servers, there will be a new signal added to the black market that will replicate the functionality of the distress signal, just limited to launch. Broadcasting Bradley spawned or destroyed will allow players to more precisely time the next occurrence which is something we're trying to avoid.