Cessna Citation Sovereign (C680)
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 50; Flight Crew Total 6500; Flight Crew Type 300
Confusion; Human-Machine Interface
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
General None Reported / Taken
Aircraft; Human Factors
[I programmed a] direct to a fix [leg] which replaced [our previous fix to a fix leg] in the FMS. [The] plane flew between our last fix and the new fix-not direct from our [present position] to the 'direct to' fix. We have multiple issues with the Honeywell Epic [FMS]; lots of gotchas.
A C680 flight crew suffered a track deviation when their attempt to program 'direct to' a cleared fix failed to produce the desired response.