In the traffic pattern, how is the turning point from the Downwind leg to the Base Leg determined? (Ref: VFR SOP Page 157)

• A) When abeam the runway threshold
• B) When the runway threshold is seen at 45° to the rear on the right or left
• C) When the altimeter indicates 500 ft AGL
• D) When the runway end is seen exactly at a 90° angle