C210 pilot entered hwd class D airspace without clearance.

Attributes
ACN	486040
Time
Date	200009
Day	Thu
Local Time Of Day	0601 To 1200
Place
State Reference	CA
Altitude	msl single value : 1400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : oak.tower
Operator	common carrier : air carrier
Make Model Name	Cessna 120
Operating Under FAR Part	Part 135
Navigation In Use	other vortac
Flight Phase	cruise : level
Flight Plan	VFR
Person 1
Affiliation	company : air carrier
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 7000 flight time type : 700
ASRS Report	486040
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Events
Anomaly	airspace violation : entry non adherence : far non adherence : published procedure other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued alert none taken : detected after the fact
Supplementary
Problem Areas	Airspace Structure Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airspace Structure	class d : hwd.d

Narrative:

Contacted oak tower for transition through class C/D airspace while tracking oak 150 degree radial and was advised by oak tower that we were within hwd airspace (without clearance). Normal transition over bay requires tracking or being southwest of oak 150 degree radial in order to avoid hwd airspace. Note: being over water there are no landmarks to determine position/airspace boundaries. I showed 2 dots right of course, but, due to distance from VOR, thought I was clear of hwd class D airspace.

Original NASA ASRS Text

Title: C210 PLT ENTERED HWD CLASS D AIRSPACE WITHOUT CLRNC.

Narrative: CONTACTED OAK TWR FOR TRANSITION THROUGH CLASS C/D AIRSPACE WHILE TRACKING OAK 150 DEG RADIAL AND WAS ADVISED BY OAK TWR THAT WE WERE WITHIN HWD AIRSPACE (WITHOUT CLRNC). NORMAL TRANSITION OVER BAY REQUIRES TRACKING OR BEING SW OF OAK 150 DEG RADIAL IN ORDER TO AVOID HWD AIRSPACE. NOTE: BEING OVER WATER THERE ARE NO LANDMARKS TO DETERMINE POS/AIRSPACE BOUNDARIES. I SHOWED 2 DOTS R OF COURSE, BUT, DUE TO DISTANCE FROM VOR, THOUGHT I WAS CLR OF HWD CLASS D AIRSPACE.

Data retrieved from NASA's ASRS site as of July 2007 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.