Ground ReferenceACS V.C
S-Turns Across a Road
Fly symmetrical semicircles of equal size on each side of a straight reference line
~13 min FAA-S-ACS-6C
60-Second Review
Quick overviewFly a series of equal, symmetrical semicircles on opposite sides of a straight ground reference line, crossing the line with wings level and perpendicular to it each time, varying bank continuously to keep the half-circles the same size despite wind, while holding altitude and coordinated flight.
FAA-H-8083-3C Ch. 6; FAA-S-ACS-6C V.C
ACS Tolerances
Altitude: ±100 feetAirspeed: ±10 knotsGround track: Symmetrical semicircles of equal size on each side of the lineLine crossing: Wings level and perpendicular to the reference line
Top Errors
- 1. Unequal semicircles
- 2. Not crossing perpendicular / wings not level
- 3. Constant bank throughout
Examiner Focus
- 1. Are the semicircles symmetrical and equal in size on both sides of the line?
- 2. Does the aircraft cross the line wings-level and perpendicular every time?
- 3. Is bank varied appropriately for groundspeed (steepest downwind)?