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RNAC/LNAV/LOC and ILS

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A broad question...

I included ILS as it's the only one I know. Instrument Landing System. Keep the purple vertical and horizontal diamonds in the middle on final approach 🙂

But what's the rest of this? What's this for?

I guess I know NDB (No directional beacon) but don't really understand that either. Is someone willing to explain it all or is there a simple Sim version?

You might want to get a Instrument rating 🙂 The 'rest' are basically GPS approaches that use fixes for more precise guidance. These are more prevalent today, especially for GA as they allow lower minimums to smaller airports without the infrastructure ILS systems require and need support for.

SAR Pilot. Flight Sim'ing since the beginning.

Check out this guy's YouTube channel.  He just did a whole series of all the different approach types using MSFS 2020.  He sometimes runs a bit heavy on the "Dad jokes", but the info is good. Quick rundown though is LOC approach is an ILS without the glidepath info so you have to descend on your own but it lines you up still.  RNAV is ILS but with GPS instead of an ILS radio.  The GPS in the plane flies you down, and they tend to be a bit buggy with the glidepath info in MSFS.  Sometimes it's not there, or kicks in much closer to the airport and lower down than it's supposed to.  I haven't heard of an LNAV approach yet, I thought that was just a navigation type that the autopilots use for navigation in general horizontally. Maybe it's the GPS version of a LOC approach or something.

 

https://www.youtube.com/channel/UCGWd_NMbp7GxMg4bZO65heQ

 

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16 minutes ago, flyinion said:

Maybe it's the GPS version of a LOC approach or something.

 

That is indeed what it is..  🙂

RNAV (GPS) approaches can be LNAV, LNAV+V or LPV.

Bert

Yes, or a 2D approach as they’re called now.

As opposed to 3D which have a coded glidepath 

Nothing is simple anymore 

787 captain.  

Previously 24 years on 747-400.Technical advisor on PMDG 747 legacy versions QOTS 1 , FS9 and Aerowinx PS1. 

36 minutes ago, jon b said:

Yes, or a 2D approach as they’re called now.

As opposed to 3D which have a coded glidepath 

Nothing is simple anymore 

To make it even more complicated, 2D is subdivided into 2D-Azimuth or 2D-CDI - simple, hey? 😄

David Porrett

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