Description

Probe (what-if) is a tool that allows the controller to test whether a planned clearance would cause a conflict without making any real change to the system.

Principle of Operation

Probe generally shares the same human-machine interface with the clearance tools (trajectory modification, level allocation, etc.). The controller is presented with a choice - either enter the modification or trigger a what-if check. This may be done e.g. by using different mouse buttons (left=execute, right=probe) or by adding a special button to all input features (if the button is pressed, then use Probe, if not - proceed with the change) or some other solution.