Correct- MLS was intended for terminal use, not enroute. MLS had three systems: AZ/EL/DME. AZ was the analog to the Localizer/LLZ, EL was the analog to Glide Slope (GS) and DME was actually a P(recision)DME with improved accuracy over a typical LOC/DME. The AZ and EL antennas were planar phased...