Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Engineer; Flight Crew Multiengine
Flight Crew Last 90 Days 50; Flight Crew Total 12000; Flight Crew Type 3500
Human-Machine Interface; Confusion; Communication Breakdown; Situational Awareness
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Became Reoriented; Flight Crew Took Evasive Action
Aircraft; Human Factors; Procedure
Departing on IFR clearance and using the airport obstacle departure procedure. After takeoff I inadvertently deleted the first waypoint. I was unable to identify using VOR raw data as my GNS [Global Navigation Satellite] unit was not receiving PGY VOR at this point. I advised ATC that I was not receiving the VOR and could not identify the radial and waypoint for the obstacle departure procedure and I asked for a radar vector. ATC advised I was below the minimum vectoring altitude and could not provide a heading. I then deviated from the obstacle departure procedure in an effort to remain clear of terrain while I sorted the issue out with my GNS unit. ATC then issued a 'low altitude alert' but still could not provide vectors as I was still below the Minimum Vectoring Altitude. I was clear of terrain at all times but I had deviated from the obstacle departure procedure therefore ATC issued the low altitude alert. Leaving 4;000' MSL ATC then provided a radar vector on course. I sorted out my GNS waypoint issue and proceeded on course. There was no loss of separation with terrain or traffic.
Pilot reported descending below Minimum Vectoring Altitude and climbed above minimum altitude when advised by ATC to do so.