GA small aircraft unauthorized penetration of oak arsa.

Attributes
ACN	120044
Time
Date	198911
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : hwd
State Reference	CA
Altitude	msl bound lower : 1500 msl bound upper : 1500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : hwd
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : atp pilot : cfi pilot : flight engineer
Experience	flight time last 90 days : 210 flight time total : 4000 flight time type : 250
ASRS Report	130044
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	non adherence : far other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : exited penetrated airspace
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Upon departure from hwd, we were instructed by the tower to remain clear of the oak arsa. We turned on our desired course and leveled off at 1500' MSL, the base of the arsa. Shortly thereafter, tower called and said 'say altitude.' we responded with, '1500'.' they responded with, 'you're in the arsa; descend below the arsa.' in retrospect, I should have responded with '1499' when asked for my altitude. I guess a lack of education on my part resulted in an arsa intrusion. I should have leveled at 1450' MSL, realizing now that 1500' MSL on the chart is the actual base of the arsa.

Original NASA ASRS Text

Title: GA SMA UNAUTH PENETRATION OF OAK ARSA.

Narrative: UPON DEP FROM HWD, WE WERE INSTRUCTED BY THE TWR TO REMAIN CLR OF THE OAK ARSA. WE TURNED ON OUR DESIRED COURSE AND LEVELED OFF AT 1500' MSL, THE BASE OF THE ARSA. SHORTLY THEREAFTER, TWR CALLED AND SAID 'SAY ALT.' WE RESPONDED WITH, '1500'.' THEY RESPONDED WITH, 'YOU'RE IN THE ARSA; DSND BELOW THE ARSA.' IN RETROSPECT, I SHOULD HAVE RESPONDED WITH '1499' WHEN ASKED FOR MY ALT. I GUESS A LACK OF EDUCATION ON MY PART RESULTED IN AN ARSA INTRUSION. I SHOULD HAVE LEVELED AT 1450' MSL, REALIZING NOW THAT 1500' MSL ON THE CHART IS THE ACTUAL BASE OF THE ARSA.

Data retrieved from NASA's ASRS site as of August 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.