Table of Contents.........................................................................................................................................................iii
Abbreviations ...............................................................................................................................................................iv
Abstract ......................................................................................................................................................................... v
1 Introduction...........................................................................................................................................................1
2 Scope of DO-242A Intent Changes.......................................................................................................................2
3 Short and Long-termIntent...................................................................................................................................4
4 Target State (TS) Reports......................................................................................................................................6
5 Trajectory Change Point (TCP) Definition .........................................................................................................10
6 Command and Planned Trajectories....................................................................................................................11
7 Trajectory Change (TC) Reports.........................................................................................................................14
8 Horizontal and Vertical TC Types ......................................................................................................................24

8.1 Horizontal TC Types...................................................................................................................................24

8.1.1 Geodesic Path (Straight Course) to Fix Lateral Transition.................................................................. 24

8.1.2 Fly-ByTurnTransition(IncludingCForTFtoFly-ByTurnSegment).............................................25

8.1.3 Direct-to Fix Lateral Transition...........................................................................................................25

8.1.4 Direct to Fly-By Turn Transition.........................................................................................................26

8.1.5 Radius to Fix Turn Transition .............................................................................................................27

8.2 VerticalTCTypes.......................................................................................................................................27

8.2.1 Unknown Altitude Type......................................................................................................................27

8.2.2 Target Altitude ....................................................................................................................................27

8.2.3 Top of Climb (TOC)............................................................................................................................28

8.2.4 Top of Descent (TOD).........................................................................................................................28

8.2.5 Estimated Altitude...............................................................................................................................28

8.2.6 Altitude Constraints (At, At and Above, At and Below).....................................................................28
9 Equipage Class Requirements.............................................................................................................................29
　
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