LTN-92 Ring Laser Gyro Inertial Navigation System

The LTN-92 Inertial Navigation System (INS) is the world's leading laser gyro replacement for the mechanical INSs used on many military transport and commercial aircraft, including "classic" B747s, DC-10s and L-1011s. The LTN-92 uses three ring laser gyros, force rebalanced accelerometers, and three high-speed digital microprocessors to provide an advanced technology, all-attitude, worldwide navigation system offering up to five times the reliability of mechanical inertial navigation systems. The system’s ability to manage internal navigation bulk data storage allows for comprehensive worldwide flight planning.

You are right, we were running the LTN-92 in TMIX with DME/DME update on the B747 classic and the DC10s. I know some operators were using the system in Dual mode with just two boxes.

Before those upgrades we used the older Delco Carousel, we also used three of these, but our units only held 9 waypoints, I know some other models would hold up to 150 waypoints. Not sure what units you used, so I thought the OP had the LTN & Delco mixed up. No big deal.......

It's all Amish went compared to a B777 or A380.