Point merge not only delivers a more efficient arrival route structure in the terminal airspace, it can be applied to the extended terminal airspace area for pre-sequencing traffic. SESAR has developed point merge for this environment to enable the arrival manager (AMAN) to establish a more predictable arrival sequence. Integrating and optimising arrival streams contributes to the overall arrival management process both in terms of aircraft efficiency and airport operations. It is this predictability which can significantly improve capacity in dense and complex terminal airspace, and avoid unnecessary holding.

The solution is composed of a point merge system coupled with an arrival management tool that provides sequencing support based on trajectory prediction. Rather than entering holding patterns, aircraft in the extended terminal area enter PBN routes referred to as point merge legs, where they fly briefly in a level-off lateral holding situation where the distance to the merge point remains constant. When the spacing with the preceding aircraft is attained, the controller will instruct the next aircraft on the leg to turn direct to the merge point. Unlike conventional traffic streams which are individually vectored, the turn the aircraft needs to perform in the point merge leg is always the same, which simplifies the controller’s tasks. The flight crew’s task is also simplified by the use of this standardised manoeuvre which is predictable and repeatable.

Flight trials have demonstrated the workability of the concept. Controllers commented on the reduction in radio communications and experienced a more orderly traffic flow. There was better adherence to AMAN advisories before aircraft reached terminal airspace, and delays tended to be absorbed in the extended terminal area, reducing noise emissions at lower altitudes.

Airspace users have the opportunity to fly continuous descent operations from the point merge legs to the merge point. The point merge legs can be flown with different PBN capabilities, which allows a mixed navigation capability to operate within the same airspace.

This solution is implemented in France, Norway, Turkey and the UK.

SJU references: #108/Release 2

Benefits

• ƒBetter management of human resources ƒ 
• Improved pilot situational awareness through the application of more standardised procedures ƒ 
• Enhanced safety ƒ 
• Reduced noise impact