Arcing Approach

Arcing approaches provide the safe and expeditious transition from the en-route environment to the terminal area.


Introduction

Introduction
  • An arcing approach is a type of instrument approach where the aircraft flies a set radius around the NAVAID in order to intercept a final approach course inbound

Maneuvers and Procedures Disclaimer

Maneuvers and Procedures Disclaimer

WARNING:
All procedures are GENERALIZED.
Fly the maneuver in accordance with the Pilot Operating Handbook (POH)
and/or current Standard Operating Procedures (SOPs)


Arc Methods

Arc Methods
  • Fly the arc via GPS:
    • Simply follow the indications on the GPS
  • Fly 10, twist 10:
    • Once established on the arc, twist the HSI 10 degrees off (in direction of turn-twist left, turn left or twist right, turn right)
    • Fly until HSI centers then turn 10 degrees along the arc and twist another 10 degrees
    • Continue doing this until you reach the lead turn radial to turn on the final approach course
    • Essentially, the pilot is turning the arc into segments

Arc Approach Procedure

Arc Approach Procedure
  1. ILS 7L KDAB
    ILS or LOC 7L KDAB Arcing Approach
  2. Listen to ATIS or tower for landing runways and possible equipment outages
  3. Request approach from Air Traffic Control
  4. Tune and identify the NAVAID and DME, as appropriate
  5. Verify that the HI or HSI is aligned with the magnetic compass
  6. Fly ATC instructions, which will be vectors for final (skip ahead) or vectors for the initial approach fix (IAF)
    • Looking at the ILS/LOC 7L, you will proceed to HANAV if from the north or MIKBE if from the south
  7. Review the approach plate and give an approach brief
  8. Determine whether to join the arc with a left or right turn
  9. Join the arc by anticipating turn radius
    • Intercepting the arc from a radial (90°), use 0.5-1% of the ground speed
    • If intercepting at less than an 90° degree angle, use less lead
    • Comply with all altitude restrictions
  10. Note the distance after the turn is completed:
    • If the DME is 0.1 greater than the arc, turn 10° toward the arc
    • If the DME is 0.1 less than the arc, maintain your current heading until the DME increases to the assigned DME distance, then turn 10deg; toward the arc
  11. To help maintain positional orientation and situational awareness, use the OBS to determine your position along the arc
  12. Complete the descent flow/checklists
  13. Fly the arc until your lead radial for the final approach course
    • Lead radial is determined using your arc distance and Ground Speed (GS):
      • 60 ÷ Arc Distance x 1% of GS
      • Example: If the arc is 16 NM, flying at 80 knots ground speed:
        • 60 ÷ 16 x .8 = 3 radials
  14. Join the final approach course and center up the CDI
    • Comply with all altitude restrictions
  15. At the Final Approach Fix (FAF), report:
    • "[Facility-Tower], [Callsign], final approach fix, gear 3 down and locked"
  16. Descend to Minimum Descent Altitude (MDA), complying with altitude restrictions
  17. At the missed approach point, execute the missed approach instructions
  18. ILS 7L KDAB
    ILS or LOC 7L KDAB Arcing Approach

Arc Approach Airman Certification Standards

Arc Approach Airman Certification Standards

Conclusion

Conclusion

References

References