1 hour ago, sd_flyer said:

if you sim pilot yes. But trust me real GPS units are far from perfect! I had at least two I owned that glitched IRL during approach. Both were bench tested and consequently serviced .

I've been using 430w for years works great!  I'd rather have a gps any day irl.  You can fly in VLOC and shoot any traditional approach, or you have the option you shoot an rnav IAP.  Always a good idea to have options.

39 minutes ago, ryanbatc said:

I've been using 430w for years works great!  I'd rather have a gps any day irl.  You can fly in VLOC and shoot any traditional approach, or you have the option you shoot an rnav IAP.  Always a good idea to have options.

I serviced two 430W units. LOL Although first one that died was not Garmin fault - dead alternator plus faulty over voltage fried it by hands of another CFI who didn't bother to check low volt light .

 

P.S. If you still have it Garmin just dropped support for 430/530 units.

8 hours ago, stefaandk said:

Euh not sure what to say to that as the whole reason for the existence of this topic is the fact that the GTN750 did not behave correctly.

It should go TARTN > CI24 which is what the built in ones do.

Instead it flies TARTN then turns a heading of 240 which isn't even going towards EGPH from its position at the time.
It just flies the runway heading ignoring the approach procedure itself and will just keep going that direction endlessly.

Yet at the same time it knows of the approach existing because if I were to pick ILS 06 it would fly 060 degrees.

 

I think I just do a direct to C 124 after I pass Tartn. Haven't flown GA in quite awhile, but that is what I remember.

In these situations I would just activate approach, in your situation when you reach TARTN.

I'm disappointed to report that the problem is very much exclusive to the pms50 GTN750 as yes it does it on every arrival/approach.

Just watched this video on the GTNXi hoping to see a flight plan setup there and this one does.

https://www.youtube.com/watch?v=XDk21iwB-8Y

Here he is setting up an arrival and approach into ESKS and I decided to do duplicate this on the GTN750 and yes the GTNXi is clearly not suffering from this issue.

On the pms50 GTN750, the airport's heading is inserted between KS582 AND KS583.

 

Compare to this screenshot from above video using the GTNXi where the last waypoint of the arrive and the first waypoint of the approach are consecutive.

 

 

While the pms50 presents appealing features, in my opinion this product is afflicted by a flaw in what I deem one of its essential functionalities.

 

 

 

Report it on their Discord channel.

22 minutes ago, Ixoye said:

Report it on their Discord channel.

They know, it's been reported multiple times.. .. ..

 

G

There are actually scenarios on the Garmins where this is the correct behavior. Generally, the units will do this if loading the approach would change your current flight guidance. In other words, if the leg you're currently on would be replaced by a different leg, the unit will instead keep the destination in the enroute segment and put the approach after that.

This is to avoid having the autopilot swing in an unexpected direction while following GPS guidance, which could potentially be dangerous if the pilot isn't expecting that.

If the units are doing that outside of this case, then I'm not totally sure. It's hard for me to tell from the descriptions what the order of operations are here. But just wanted to bring up that FYI in case folks were thinking the units should never do that under any circumstances, which is not the case.

@MattNischan It's not that, done that approach many times in pretty much every "Garmin" flightsim product......

The G3000 behaves in exactly the same way as the trainer, the PMS doesn't. If you load the approach in any of them (in this case EGPH/ILS24 with TLA transition) it will keep EGPH at the bottom of the Flightplan and drop the approach below it. However, in the G3000 or trainer you can delete out EGPH so it sequences correctly (both if these also let you change altitude restrictions). In the PMS deleting out EGPH deletes the approach after it.

Pretty sure that's what happened pre AAU1...

 

G

 

57 minutes ago, Gazzareth said:

@MattNischan In the PMS deleting out EGPH deletes the approach after it.

Goes beyond that even, it obviously still treats EGPH albeit below the arrival and still ahead of the approach as the destination of the flight plan and trying to remove it on the assumption it can be like any waypoint just wipes the flight plan all together.

The same flaw happens on every single transition from arrival to approach I have entered so far, based on this if I could refund the product I would as the ability of a PAID add-on GPS to follow the flight plan correctly surely can't be an unreasonable expectation.

The reason I chose this unit over the GTNXi was Navigraph support, the fact that the in sim waypoints would match but what's the point of them matching if it doesn't use them correctly, not only that I can't even correct them myself for reasons explained prior!

 

I thought I would add my 2 cents. I also needed to figure this out, and the explanation form Matt is the correct one. Check out this great tutorial at https://hang-out.co.uk/uploads/Flying-an-Approach-with-GTN750.pdf. Page 12 of the PDF is the situation you have been referring to.

 

 

On 3/5/2024 at 12:48 AM, Bert Pieke said:

Actually, the TDS GTN750 flies the approaches correctly.. so should belong on your list.

You just have to know how it works. 

 

14 minutes ago, Bobsk8 said:

You just have to know how it works. 

 

That is the whole story, right there 🙂