General aviation pilot reported a runway incursion resulted at sts airport due to the lack of famili...

Narrative:

After ATIS check on ramp; contacted ground control for taxi clearance; requesting straight out departure from runway 14. I received clearance to taxi to 14 via kilo; alpha; which I read back. I am not familiar with the airport layout; but my aircraft is equipped with an EFIS including airport layout diagrams; and I monitored my progress during taxi on the moving map display. As I arrived at the run-up area; I noticed signage at taxiway hotel; showing both runway 20 and 14. It appeared that to reach runway 14 would require I enter runway 20. I thought there was another run up area at the end of 14 ahead; so I continued toward the end of runway 14. Seeing the hold line and blinking light; but thinking I was cleared to taxi to 14; I hesitated; but then continued through the runway 20 approach hold zone to the end of 14. When I arrived; ground control directed me to hold my position and contact the tower; which I was about to do. I was subsequently cleared for takeoff with a straight out departure. On climb; I was asked to call ATC once I was back on the ground.my later discussion with sts tower indicated that my taxi clearance was to the 14 run up area; which I misinterpreted as runway 14. I have no recollection of the run-up area being mentioned in my taxi clearance; but it could be that I simply wasn't listening for this distinction. My unfamiliarity with the airport; despite my sophisticated cockpit display; led me to believe that I was cleared to cross the hold line on my way to runway 14.

Original NASA ASRS Text

Title: General Aviation pilot reported a runway incursion resulted at STS airport due to the lack of familiarity with the airport and a miscommunication with Ground Control.

Narrative: After ATIS check on ramp; contacted ground control for taxi clearance; requesting straight out departure from Runway 14. I received clearance to taxi to 14 via Kilo; Alpha; which I read back. I am not familiar with the airport layout; but my aircraft is equipped with an EFIS including airport layout diagrams; and I monitored my progress during taxi on the moving map display. As I arrived at the run-up area; I noticed signage at taxiway Hotel; showing both Runway 20 and 14. It appeared that to reach Runway 14 would require I enter Runway 20. I thought there was another run up area at the end of 14 ahead; so I continued toward the end of Runway 14. Seeing the hold line and blinking light; but thinking I was cleared to taxi to 14; I hesitated; but then continued through the Runway 20 approach hold zone to the end of 14. When I arrived; Ground Control directed me to hold my position and contact the Tower; which I was about to do. I was subsequently cleared for takeoff with a straight out departure. On climb; I was asked to call ATC once I was back on the ground.My later discussion with STS tower indicated that my taxi clearance was to the 14 run up area; which I misinterpreted as Runway 14. I have no recollection of the run-up area being mentioned in my taxi clearance; but it could be that I simply wasn't listening for this distinction. My unfamiliarity with the airport; despite my sophisticated cockpit display; led me to believe that I was cleared to cross the hold line on my way to Runway 14.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1421492
Time
Date	201701
Local Time Of Day	1201-1800
Place
Locale Reference	STS.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Aircraft Low Wing 1 Eng Retractable Gear
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Route In Use	None
Flight Plan	None
Person 1
Function	Single Pilot Pilot Flying
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 10 Flight Crew Total 730 Flight Crew Type 500
Person 2
Function	Ground
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Deviation - Procedural FAR Deviation - Procedural Clearance Ground Incursion Taxiway Ground Incursion Runway

General aviation pilot reported a runway incursion resulted at sts airport due to the lack of familiarity with the airport and a miscommunication with ground control.