Abstract: Digital recording and replay system for an aircraft, comprising a Mission Computer with an Operational Flight Program for generating instrument data for onboard instruments of the aircraft; a Mission Data Recorder connected to said Mission Computer for recording said instrument data; and a Mission Debriefing System; wherein the Mission Debriefing System is configured to reproduce the onboard instruments of the aircraft based on instrument data retrieved from the Mission Data Recorder. Method for reproduction of onboard instrumentation of an aircraft, comprising the steps of connecting a Mission Data Recorder to a Mission Computer of an aircraft having an Operational Flight Program for generating instrument data for onboard instruments; recording instrument data; providing a Mission Debrief System and causing it to reproduce the onboard instruments of the aircraft based on instrument data retrieved from the Mission Data Recorder.