Communications Support Forums

Apologies if this is a really obvious question but I can't find a straight answer.

Been trying to get CSBK data working with enhanced GPS and MNIS. In the MNIS configuration where I configure conventional systems, there's a table for adding GPS coordinates of the repeaters at the bottom. The only thing I can find in the system planner is the following:

The location information is compressed into a single CSBK, and recovered at the control
station or MNIS with the location information of the repeater. IPSC/Capacity Plus Multi
Site does not work with a control station for location CSBK data, because the control
station does not know where the location data comes from. However, IPSC/Capacity
Plus Multi Site works with the MNIS.

So what is actually sent from the radio that also requires the coordinates of the repeaters to work? Does it use some triangulation where it combines partial location data from the radio with the coordinates of the repeater to arrive at the actual location of the radio? Sounds overcomplicated.