There's an updated AC 90-108 from 04/21/15 that seems to specifically say you cannot use an RNAV system for a final approach segment on an NDB approach. Here's the relevant text (it's under section 8, which is titled "USES OF SUITABLE RNAV SYSTEMS NOT ALLOWED BY THIS AC"): "b. Substitution on a Final Approach Segment (FAS). Substitution for the NAVAID (for example, a VOR or NDB) providing lateral guidance for the FAS." "Substitution" is defined as "The use of information from an RNAV system in lieu of that from out-of-service conventional NAVAIDs and/or inoperative or not-installed navigation equipment compatible with conventional NAVAIDs." I take that to mean that you must at least have ADF installed and be monitoring the NDB in order to fly the final approach segment of an NDB approach. The newest AIM seems to confirm this; in section 1-2-3 it says "4. Pilots may not substitute for the NAVAID (for example, a VOR or NDB) providing lateral guidance for the final approach segment." So I don't think this approach, if you flew it in real life, would be legal. But it did at least give me an excuse to look up the regs again, which is never a bad thing to do.
Thanks for letting me know about an updated AC, I was not aware of it. What I mean by monitoring the NDB - When flying a NDB approach, the morse code had to be monitored the whole time your are making reference to the ADF. Since there is no flag on the ADF, like a VOR, it was the only way you knew if it is working correctly. If you forgot to monitor the morse while using the ADF, I am quite sure that was an instant failure of the Australian instrument rating checkride back in the 1990s. In the flight sim I always leave it off, but in real life I always had it on the overhead loudspeaker instead of in my headset. As long as you could hear the morse code, the requirement was met. I suspect the only time people fly NDB approaches now is for training purposes only. The KUMP RNAV GPS RWY 15 has the same MDA as the NDB approach, but the GPS approach is easier to fly and more accurate.
There's an updated AC 90-108 from 04/21/15 that seems to specifically say you cannot use an RNAV system for a final approach segment on an NDB approach. Here's the relevant text (it's under section 8, which is titled "USES OF SUITABLE RNAV SYSTEMS NOT ALLOWED BY THIS AC"): "b. Substitution on a Final Approach Segment (FAS). Substitution for the NAVAID (for
example, a VOR or NDB) providing lateral guidance for the FAS." "Substitution" is defined as "The use of information from an RNAV system in lieu
of that from out-of-service conventional NAVAIDs and/or inoperative or not-installed navigation equipment compatible with conventional NAVAIDs."
I take that to mean that you must at least have ADF installed and be monitoring the NDB in order to fly the final approach segment of an NDB approach. The newest AIM seems to confirm this; in section 1-2-3 it says "4. Pilots may not substitute for the NAVAID (for example,
a VOR or NDB) providing lateral guidance for the final approach segment."
So I don't think this approach, if you flew it in real life, would be legal. But it did at least give me an excuse to look up the regs again, which is never a bad thing to do.
Thanks for letting me know about an updated AC, I was not aware of it. What I mean by monitoring the NDB - When flying a NDB approach, the morse code had to be monitored the whole time your are making reference to the ADF. Since there is no flag on the ADF, like a VOR, it was the only way you knew if it is working correctly. If you forgot to monitor the morse while using the ADF, I am quite sure that was an instant failure of the Australian instrument rating checkride back in the 1990s. In the flight sim I always leave it off, but in real life I always had it on the overhead loudspeaker instead of in my headset. As long as you could hear the morse code, the requirement was met. I suspect the only time people fly NDB approaches now is for training purposes only. The KUMP RNAV GPS RWY 15 has the same MDA as the NDB approach, but the GPS approach is easier to fly and more accurate.
Nice video, but I was looking at how to fly an NDB approach without GPS since what you're doing is not allowed in Europe yet.
You could use the ADF to satisfy the lack of a GPS. The ADF however cannot he used for final approach guidance. Hope this helps?
@@rylans.5365 my issue was trying to understand the ADF in the G1000 specifically. Found another video where they show how it works.
Buckridge Stravenue
Botsford Highway
Raegan Plains
Sydnie Valleys
Dickens Viaduct