C210 pilot reported momentary loss of GPS signal while departing hwd airport.

Attributes
ACN	1620299
Time
Date	201901
Local Time Of Day	0601-1200
Place
Locale Reference	HWD.Airport
State Reference	CA
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Cessna 210 Centurion / Turbo Centurion 210C 210D
Operating Under FAR Part	Part 91
Flight Phase	Initial Climb
Route In Use	Direct
Flight Plan	None
Component
Aircraft Component	GPS & Other Satellite Navigation
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Private Flight Crew Instrument
Experience	Flight Crew Last 90 Days 30 Flight Crew Total 4500 Flight Crew Type 3500
Events
Anomaly	Aircraft Equipment Problem Less Severe Airspace Violation All Types Deviation - Procedural FAR

Narrative:

When departing hwd heading 010 and approximately 3 nm from the airport; all GPS signal was lost on both garmin wass receivers and 1 portable. The signal was restored at about 5nm. The loss of positional awareness may have caused the aircraft to climb above 1500 ft. And into oakland class C airspace. This loss of signal also happened on another occasion. During this time period; the RNAV 28L approach was notamed out of service. When I asked the hayward tower about the loss of signal - they did not know of the loss of signal. A NOTAM should have been issued that there was GPS signal loss in this area.

Original NASA ASRS Text

Title: C210 pilot reported momentary loss of GPS signal while departing HWD airport.

Narrative: When departing HWD heading 010 and approximately 3 nm from the airport; all GPS signal was lost on both Garmin WASS receivers and 1 portable. The signal was restored at about 5nm. The loss of positional awareness may have caused the aircraft to climb above 1500 ft. and into Oakland Class C airspace. This loss of signal also happened on another occasion. During this time period; the RNAV 28L approach was NOTAMed out of service. When I asked the Hayward Tower about the loss of signal - they did not know of the loss of signal. A NOTAM should have been issued that there was GPS signal loss in this area.

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.