4.3.3 Terminal Departure: Free Maneuvering for User-Preferred Departures
4.3.3.1 Problem
Inefficient departure routing due to static restrictions for separation conformance.
In terminal areas with low traffic density, aircraft are often cleared for immediate climb and on-course heading soon after initial contact with departure control. However, during conditions of moderate or high traffic density, controllers ensure traffic separation by instructing aircraft to follow published departure routes, thereby reducing the workload of monitoring for conflicts and vectoring aircraft for conflict resolution. These standard departure routes are designed for managing high traffic-density levels and do not necessarily provide efficient and expeditious routing consistent with the intended en route course of all aircraft.
4.3.3.2 Solution (Flight Deck focus)
Appropriately equipped aircraft are given authority to select departure path and climb profile in real time, along with the responsibility to ensure separation from local traffic.
During terminal-area operations, appropriately equipped aircraft are given the authority to use FD-based trajectory planning DSTs to autonomously select and implement a preferred departure path and climb profile. Pre-departure clearance to operate in this mode is given by the ATSP, based on an assessment of acceptable levels of terminal-area constraints. While operating in autonomous departure mode, the flight crew is responsible for ensuring separation from local traffic. The flight crew performs this task with the aid of a CDTI with CD&R capability, linked to a trajectory-planning capability. Aircraft intent information is automatically broadcast via datalink to assist other equipped aircraft and ATSP in conflict detection. The ATSP monitors all operations in the terminal area and continues to provide normal departure-clearance services to aircraft not equipped for free maneuvering. For cases where the flight crew attempts, and fails, to resolve a conflict, automated systems or the ATSP will provide a required resolution.
4.3.3.3 Potential Benefits
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Increased departure efficiency, due to user’s ability to select their own departure trajectories.
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Reduced controller workload due to reduced voice communications, particularly in regions of high frequency congestion.
4.3.4 Terminal Departure: Trajectory Negotiation for User-Preferred Departures
4.3.4.1 Problem
Same as 4.3.3.1, but repeated below for completeness.
Inefficient departure routing due to static restrictions for separation conformance.
In terminal areas with low traffic density, aircraft are often cleared for immediate climb and on-course heading soon after initial contact with departure control. However, during conditions of moderate or high traffic density, controllers ensure traffic separation by instructing aircraft to follow published departure routes, thereby reducing the workload of monitoring for conflicts and vectoring aircraft for conflict resolution. These standard departure routes are designed for managing high traffic-density levels and do not necessarily provide efficient and expeditious routing consistent with the intended en route course of all aircraft.
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本文链接地址：Concept Definition for Distributed Air/Ground Traffic Management (DAG-TM)(21)
