Input Signal type Model NT920 HDI ~ typically for use with electronic / GPS compass types ff nú/oí pulse output speed logs. Simultaneous Outputs: - Navitron Autopilot Data Navitron Serial Data Heading & Speed: - With NMEA 0183 fHDM & HDG) Simultaneous outputs: - ■ Navitron Scriaf Data Deviation programmable Model IUT923 HDI - For serial data acquisition from Magnetic card compass. Gyro Input signal types: - Synchro ratios: Simultaneous Outputs: - ■ Navitron Serial Data ■ Isolated Step by Step: - Model IMT925 HDI ~ for mul&data type acquisition from most gyrocompass types combining speed log data if required.