Cross Country Lesson 15: Ground Speed (Inflight) Watch Next XCross Country Lesson 17: Joining the Circuit (Inflight)Previous Video Cross Country Lesson 15: Ground Speed (Inflight) Next Video Cross Country Lesson 17: Joining the Circuit (Inflight) Cross Country Lesson 16: The Big Picture (Inflight) QUIZ Series: Cross Country In-flight Lessons (14)Big picture Share