Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument
Communication Breakdown; Confusion
ATC Issue All Types; Deviation - Altitude Crossing Restriction Not Met; Deviation - Altitude Overshoot; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Returned To Clearance
Airspace Structure; Chart Or Publication; Procedure; Human Factors
Initial departure clearence was received and loaded into FMS (Flight Management System) by copilot. Once both pilots were in cockpit; copilot communicated clearance to PIC with note we were cleared to FL190. Upon taxi out; I requested copilot to brief departure and verify altitude with ATC. ATC confirmed with terminology that we were cleared to FL190 however comply with OAK5 departure. We took that as use OAK5 for lateral guidance however climb to FL190 for vertical guidance. Upon passing through 2;000 feet we were advised of the deviation. We corrected and were handed to another controller who also confirmed deviation.Suggest that departure plates be designed to indicate 2;000 feet as top altitude. Also; that ATC should not advise of a higher altitude until they are ready for us to fly to that altitude. Very confusing on what they are wanting us to do. FMS also only shows that we should be above 1400 feet. Not between 1;400 and 2;000 feet. So unless immediate action is taken directly after take off by pilot flying; FMS and flight director will automatically instruct pilot to fly to the FL190 as cleared by ATC. As well as instruct auto-throttles of a power setting almost impossible to level off with at such a low altitude.
GIV Captain reported altitude deviation on climb out.