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Internal FMS vs GNS430

Scheduled Pinned Locked Moved Starship
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  • K Offline
    K Offline
    KBrenna
    wrote last edited by
    #1

    Hi all,

    First of all, I want to express my gratitude for such an amazing product. I haven't had this much fun in a flightsim for a long time. Taking my time doing test-sectors to memorize flows, checklist and procedures and having a blast with it.

    I wanted to ask about the GNS430 vs the Starships internal flight management system.
    From the manual it says that the GNS430 can be used to perform arrivals, departures, procedure turns and provide vertical guidance.

    I'm trying to grasp the whole PBN-capability in todays modern aviation world, and I have to say I'm not finding it easy. (Even though I'm studying the stuff as part of my ATPLs)

    First and foremost,

    Many SIDs and STARS today (at least in Europe where I'm based) are RNAV1. In practical terms, they are not difficult to set up in the Starships internal FMS. Just write in the waypoints in the flightplan and you're good to go. But in terms of legality - is it allowed to do it like this? Or do you have to use use navigation equipment (ex. The GNS430) to load the procedures in order to make them legal? My conclusion on the matter is Yes - because some procedures may specify that a waypoint on the procedure may be either a fly-by or fly-over fix, and the internal FMS won't take that into concideration. But that's me assuming... I would love to hear others view on the matter.

    I exclude procedures including DME-arcs, procedure turns etc. I know that in order to fly those correctly I need to use the GNS430 or revert to good ol' fashioned stop-watch and "turn 10, twist 10" techniques using conventional aids. This is specifically regarding these RNAV1-type SID/STARS.

    I also tried to dive into the world of PBN-capability. And let me tell you I find this to be a nightmare. I've been googling for the last 30 minutes to find some sort of documentation that explains what PBN-codes I should be using in my flightplan if the aircraft is equipped with a GNS430.
    So that would be my other question - What PBN-codes should I be using with the Starship based on its FMS, and if anyone knows, what are the PBN-codes to use for a GNS430.

    Long post. I thank you if you made it this far. And I hope it makes sense what I'm trying to ask.

    Happy flying!

    Kim

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    • A Offline
      A Offline
      Avionic
      wrote last edited by
      #2

      "Pilots shall not fly an RNAV 1 or RNAV 2 SID or STAR unless it can be retrieved from the on-board navigation database using the procedure name and is consistent with the procedure in the chart."

      No loading SID/STARs from database in the built in system, so European SID/STARs you can legally fly without an external unit are starting to become more rare.

      DME-arcs and procedure turns (not Radius to Fix procedures) on the other hand are no problem. Anything equipped with VOR/DME can fly them. Just need to do that good old piloting thing 😁

      PBN capabilities are confusing to say the least. For the 430 and other "normal" equipment you can look up this Foreflight page to see what the units can provide: https://support.foreflight.com/hc/en-us/articles/360049193173-ICAO-Equipment-and-PBN-Code-Setup-Guide
      Unsurprisingly though, the list does not include the built in Collins avionics. Specific code also depends on whether you disable the built in GNSS in the CDU.

      Garmin also has an okay page for explaining what each of the codes means:
      https://support.garmin.com/en-US/?faq=hDbN1ryrqe4GkBour6SzC8

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