C182 pilot reported an near midair collision near the golden gate bridge at 1;600 feet MSL.

Attributes
ACN	1577929
Time
Date	201809
Local Time Of Day	1201-1800
Place
Locale Reference	NCT.TRACON
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skylane 182/RG Turbo Skylane/RG
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	None
Flight Plan	None
Aircraft 2
Make Model Name	Small Aircraft Low Wing 1 Eng Retractable Gear
Person 1
Function	Captain Pilot Flying Single Pilot
Qualification	Flight Crew Private
Experience	Flight Crew Last 90 Days 15 Flight Crew Total 435 Flight Crew Type 18
Events
Anomaly	Conflict NMAC
Miss Distance	Horizontal 300 Vertical 100

Narrative:

I received an advisory from norcal approach that an unknown aircraft was traveling toward the golden gate bridge in a westerly direction. The controller advised another aircraft and I that the unknown aircraft was traveling at 220 kts. At the time of the notification from the controller; I was approximately 1 nm west of the golden gate bridge and traveling southbound to fly parallel with the golden gate bridge. As I flew to the west side of the golden gate bridge and turned my aircraft toward the center of the bridge; I saw an aircraft larger than the cessna 182 I was flying travelling toward me. We were at approximately 1600 ft MSL. I immediately turned my aircraft hard to the right and began a decent. The aircraft appeared to only have one occupant inside. After the near miss I flew back to [my home airport]. The norcal controller advised me 'that's the second time he has done that.'

Original NASA ASRS Text

Title: C182 pilot reported an NMAC near the Golden Gate Bridge at 1;600 feet MSL.

Narrative: I received an advisory from Norcal Approach that an unknown aircraft was traveling toward the Golden Gate Bridge in a westerly direction. The controller advised another aircraft and I that the unknown aircraft was traveling at 220 kts. At the time of the notification from the controller; I was approximately 1 nm west of the Golden Gate Bridge and traveling southbound to fly parallel with the Golden Gate Bridge. As I flew to the west side of the Golden Gate Bridge and turned my aircraft toward the center of the bridge; I saw an aircraft larger than the Cessna 182 I was flying travelling toward me. We were at approximately 1600 ft MSL. I immediately turned my aircraft hard to the right and began a decent. The aircraft appeared to only have one occupant inside. After the near miss I flew back to [my home airport]. The Norcal controller advised me 'That's the second time he has done that.'

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.