FIG 6-3-3 Double Swell (30 knot wind) PRIMARY SWELL SECONDARY SWELL ING CH DIT ING AD HE WIND FIG 6-3-4 (50 knot wind) SWELL IN Aircraft with low landing speeds - land into the wind. Aircraft with high landing speeds - choose compromise heading between wind and swell. Both - land on back side of swell. 6-3-4 Distress and Urgency Procedures