One advantage of the above-described implementation is dynamic modification to an initial trajectory profile in response to impermissible flight conditions. As a non-limiting example, the initial flight plan can indicate that an aircraft is to have a turn radius of 10 kilometers to pass by a waypoint in the initial flight plan. However, due to impermissible flight conditions (e.g., unexpected tail wind), completion of the turn at the turn radius would violate the airplane's operational capability (e.g., the bank angle would be too steep) so the aircraft would be unable to stay on the trajectory profile. Thus, to ensure the airplane has a flyable trajectory profile, a flight management system can modify the initial trajectory profile during the flight to modify a turn transition (e.g., move the turn initiation point upwind on the trajectory profile 0.5 kilometers) so that the airplane can initiate the turn sooner and, therefore, comply with the rules for the given flight plan.
Additionally, one or more of the features, functions, and advantages that have been described can be achieved independently in various implementations or can be combined in yet other implementations, further details of which are disclosed with reference to the following description and drawings.