| Parameter | Value | |------------------------|----------------------------------| | Gyro bias stability | < 0.003° / hour (typical) | | Position error (INS) | 0.8 NM / hour (circular error rate) | | Alignment time | 5–15 minutes (depending on mode) | | Warm-up time | Approx. 3 minutes | | Operating temperature | -55°C to +70°C | | Dimensions (control unit) | 4 MCU – 4 MCU (standard 1/2 ATR) | | Power | 115V 400Hz, 60VA typical |

The is more than a technical document—it’s a time capsule to an era when pilots needed to understand gyroscopic precession, coordinate math, and system logic. Whether you are troubleshooting a drift alarm in a real Gulfstream IV or programming your tenth waypoint in a virtual Boeing 737-200, the manual holds the answers.

It’s not 100% accurate. Over time, it "drifts" (usually about 0.3nm per hour). The Solution: The system uses Triple Mixing (TMIX) to average the position of three independent units or RNAV updates

The integrity of the navigation solution depends entirely on the accuracy of the initial alignment . If the manual procedures for entering the initial position are skipped or performed hastily, the system will navigate with errors throughout the flight.