That is correct for the Tracker, but not so for the standard Phantom tracker which is proactive. We had ours fitted prior to delivery although it is not a standard fit. Standard is the normal Tracker unit which is as good as a wet paper bag. You need to notify the cal centre that the caravan is missing and if in storage this may be weeks or months.
There are an increasing number of alarm systems which notify either the control center or the owner directly if the system is triggered. So the Phantom is not unique in that respect.
Like all other alarm and tracker systems, it only alerts to an event after it has been triggered, and by my definition that makes it reactive, not proactive. If any system is triggered that means the crime has already occured.
To be proactive it would need to be able to spot activity and notify the control center of the threat before the caravan is attacked.
I'm sorry if you have been taken in by the companies deliberate misleading advertising on that point.
I have not seen any validated statistics about recovery rates, so perhaps Phantom might have a greater success rate than other systems, but that doesn't make it proactive. and it doesn't mean that all other systems are entirely useless.