LN-100G RTD2 has the capability to emulate selected messages provided by GPS receivers. This allows the user to replace the actual GPS receiver and virtually fly, drive, or dive and test the other onboard systems that rely on the GPS receiver for position, navigation and timing information. Current Messages supported: T03 – Hybrid Output 1 T04 – Hybrid Output 2 T08 – Radar Data 3 T09 – GPS Background Navigation T14 – GPS Foreground Navigation Data T15 – Time Mark Output 1 T17 – Hybrid Covariance Data T24 – Time Mark Output 2 T30 – BIT Status T31A – Unfiltered Navigation Data