A failed NASA mission, in which a spacecraft crashed into a satellite instead of autonomously docking with it, suffered serious problems with its navigation systems, according to a summary report on the the official investigation, released on Monday.

The $110 million DART mission – Demonstration of Autonomous Rendezvous Technology – went awry in April 2005. At the time of the crash, reads the report: “DART was flying toward [the satellite] at 1.5 metres per second while its navigational system thought it was 130 metres away and retreating at 0.3 metres per second.”

The summary report – which will not be released in full due to the sensitivity of its contents – cites a lack of engineering experience and lack of consultation with advisors, pressure to meet deadlines and a failure to adequately test all technical decisions as key factors in the failure.