Amateur/Home Built/Experimental
Flight Crew Private
Flight Crew Last 90 Days 30; Flight Crew Total 1400; Flight Crew Type 150
Situational Awareness; Time Pressure; Communication Breakdown
Conflict NMAC; Deviation / Discrepancy - Procedural Published Material / Policy; Ground Incursion Taxiway
Flight Crew Took Evasive Action
Environment - Non Weather Related; Human Factors; Procedure
Calm winds prevailed on arrival. Traffic was using [Runway] 33. I landed and fueled. Calm wind runway at SPB is Runway 15. I prepared to takeoff and announced on the radio that calm wind runway was 15 and winds where calm. I again announced I was holding for 15. Inbound traffic started to announce their 45's for 15; including one aircraft turning base on 15. I announced my departure on 15 and rolled. A fixed wing pilot who fueled ahead was non-responsive. I assumed he was holding on 33 and heard my intentions. Upon rotating I sidestepped to the west of the runway approximately 50 FT. The low wing came into view rolling on 33. It was immediately obvious he saw me and side stepped to the east. I announced that two aircraft; a red and yellow biplane and a low wing aircraft where departing in separate directions; 15 and 33 to alert other traffic. Other traffic acknowledged. The departing low wing aircraft announced he was crosswind 33 and I announced I was crosswind 15. We went our separate ways. The two aircraft maintained visual separation at all times. I estimate we passed each other no closer than 250 FT. The low wing aircraft was not using his radio which led to the event and was not following local procedure to use [the] calm wind Runway 15.
A pilot reported departing SBP Runway 15 with calm winds and having a near-miss with a fixed wing pilot departing Runway 33 who did not utilize CTAF communications procedures. Both pilots side stepped to avoid a collision.