What is prohibited regarding the FMS and DME arc tracking?

Capturing and tracking a DME arc outside published endpoints is prohibited because it can create significant navigation challenges and increase the potential for navigational errors. The DME (Distance Measuring Equipment) arc is designed to be utilized within specific published parameters that ensure safe and efficient navigation for pilots. Tracking outside these endpoints can lead to loss of situational awareness, potential conflicts with other air traffic, and issues with maintaining the correct aircraft flight path. Adhering to the defined limits of the DME arc is essential for maintaining safety and operational integrity during flight.

Other choices may involve operational specifics but do not inherently represent safety violations like tracking outside published DME arc endpoints does, keeping flight within safe navigational practices.