현직파일럿ㅣVOR강좌ㅣDME아크ㅣDME ARC

Summary

Captain Moses explains how to fly a DME arc using a procedure chart and a flight-simulator demonstration. A DME arc is a curved segment flown at roughly constant distance from a VOR/DME station. The lesson covers planning the entry, using the OBS and CDI to track changing radials, correcting for wind and distance drift, and leaving the arc to intercept an inbound course.

Main Ideas

• Read the procedure chart before flying. Identify the station, required DME distance, direction of the arc, and the inbound course or procedure to join afterward. The instructor uses a Gimhae chart as an example.
• The arc is defined by distance from the station. The aircraft follows a curved path while maintaining the specified DME reading. The lesson discusses an illustrative 15-mile arc and demonstrates a 20-mile arc.
• The entry and turns depend on the situation. Work out the turn sequence based on whether the aircraft is inbound or outbound, whether the arc is left or right, and what the chart requires. Do not assume one sequence applies to every arc.
• Use small, repeated course changes to follow the arc. The examples use OBS settings and CDI centering to move between radial segments, often in increments of roughly 10 degrees.
• Treat a 90-degree intercept as a starting point, not a fixed rule. Wind, speed, and turn timing affect DME distance, so make small adjustments rather than abrupt corrections.
• Leave the arc by joining the charted inbound course. As the aircraft approaches the exit point, set up the inbound course and use the CDI to establish the intercept.

Method Described in the Lesson

1. Study the chart. Identify the station, arc distance and direction, entry direction, and the course or approach to join after the arc.
2. Determine the turn sequence. Establish whether the aircraft is inbound or outbound and whether it needs a left or right arc.
3. Set up the navigation instruments. Use the OBS and CDI to identify the relevant radial or course and monitor when the CDI centers.
4. Begin the turn with distance in mind. In the simulator example, the instructor begins turning about one mile before the target distance, then adjusts as needed. This is a practical technique, not a universal rule.
5. Track the arc in segments. As the CDI centers, select the next course or radial setting and continue around the station. The demonstration uses successive small changes, commonly about 10 degrees.
6. Monitor DME continuously. Compare the indicated distance with the target arc distance. If the aircraft drifts from the desired distance, adjust the intercept angle or heading in small increments.
7. Account for wind and speed. Distance may increase or decrease depending on conditions and turn timing. The instructor recommends avoiding large, sudden corrections; the examples use modest changes of roughly 10 degrees.
8. Exit toward the next procedure. Near the charted exit, set the inbound course and use CDI guidance to turn onto it.

The transcript contains heavily garbled technical terms and numerical details. The clearest practical lesson is to use the chart and instruments to reason through each turn while continuously monitoring DME, rather than relying on a memorized turn sequence.

Speakers and Sources

• Captain Moses — The instructor and primary speaker, explaining the chart and demonstrating the DME arc in a simulator.
• No other clearly identifiable speakers are featured in the subtitles.