![]() (Worth noting that there are LP approaches that have no vertical component in the real world, but again I think including every possible type would make Infinite Flight too complex for the average user) Because of the increased accuracy these approaches are nearly as good or even better than a normal ILS, in fact they normally have the same minimums as a CAT I ILS and are generally more accurate. Hence the “Localizer Performance” because it is made to behave identically to a localizer. So if an LNAV/VNAV approach already has vertical guidance what makes this one better? Well remember how I said the course with stays the same on an LNAV only approach and on an LNAV/VNAV? That isn’t the case here. ![]() While the difference is somewhat more nuanced than that in the real world, that is more than acceptable for the level of simulation Infinite Flight has.Ĭould it be even better than that? Yes! The best type of RNAV GPS approach is an LPV approach, or Localizer Performance with Vertical guidance. For the purposes of Infinite flight I think it would be perfectly fine if this was implemented as little more than the already existing glide-slope indicator but purple (GPS navigation information shows up as purple while radio based navigation like ILS systems and VORs show up as green, this is already how it works in Infinite flight too for the CDI). ![]() This lowers the minimums and gives you more information for your approach. The LNAV component is the same, but now it adds vertical guidance as well, much the same as a glide slope on an ILS. How could this be easily improved? Well the next step up that requires minimal change is for them to make the approach LNAV/VNAV. These approaches have the highest minimums of the three (minimums are largely ignored in Infinite Flight though) and provide the least information to the pilot. I am not entirely sure that Infinite Flight even actually scales down the course sensitivity to 0.3 miles of if it is the same sensitivity as anywhere else in your flight. This is currently (as far as I can tell) the extent of RNAV approaches in Infinite Flight. It is usually about 0.3 miles, which means a full scale deflection on the CDI means you are 0.3 miles either side of course wether you are miles away from the runway, or at the missed approach point (MAP). The course width remains constant all the way from about two miles before the final approach fix (FAF) to the runway. The key distinction for this type of approach as compared to a localizer approach is that the approach course does not narrow. ![]() It will give you side to side info, but no vertical information. This can be thought of as being much like just having the localizer element of an ILS. The most basic kind of RNAV GPS approach is an LNAV only approach. RNAV approaches are mainly GPS approaches (other kids do exist but will be omitted for this topic) and are considered a non precision approach, though some are flown much like a precision approach and can be just as effective depending on the airport and aircraft. Let’s start broad though, what is an RNAV approach, and what type currently exists in the game. If you really want to fully understand RNAV approaches, their requirements, pros/cons, limitations, etc then I encourage you to do your own research as there is a lot of information out there. I will be ignoring many different types and considerations to boil it down to main types, and omitting some details for simplicity. I don’t intend for this to be a full technical explanation of, or guide to different RNAV approach types though. For those of you who don’t fly in the real world some of this may go over your heads a little, but I will try to explain what the basic concepts are and how they benefit you. Currently in Infinite Flight RNAV approaches are LNAV only, I think it would be great if we could get LPV approaches or at least LNAV/VNAV approaches.
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