Alerts with ARNB 2009

[AirNav Support]

Do those specfic aircraft which are appearing double have ADS-B (are they shown on the map) or do they only appear in the list only (i.e Mode-S enabled only)

[Tailwinds]

Airnav....

They do not show on the map, only in the list of "My Flights" so yes, Mode S only.

[tarbat]

I assume the aircraft that you are seeing double in the alerts are only Mode-S?

Yes, mine are ModeS only, non-positional non-ADS/B aircraft that give double alerts.  So, maybe a bug in the handling of alerts for non-ADS/B aircraft?

[Allocator]

I just don't get this happening, even though I've got alerts set up for US and Brit Mil aircraft that don't give their positions.

Here are a few alerts from this evening - no duplicates here.

[Tailwinds]

Allocator....

Fact is, it's happening for at least two of us and maybe others too. I am getting this double entry every time. I am doing nothing wrong in the set-up of my three alerts with regard to simply entering the registration numbers.

[tarbat]

Maybe it's only on non-ADS/B Registrations that these duplicate alerts occur.  This is my alert setup, and I appear to get duplicates.  To be honest, I personally don't find it a problem, and would make it a low-priority bug, but it does appear to happen.

[Allocator]

I'm not disputing that it's happening to you Tailwinds, it just isn't happening to me so I can't offer any solutions.  I fault find by making an error happen, then I work backwards to see why it's happening.  Users find bugs that I've never noticed, but by following their actions I can reproduce them and suggest a fix.  With this one, I can't get it to happen, although I feel that there might be a blank entry in one of the boxes, or the same aircraft being alerted twice because there is something common in 2 boxes maybe.  I'm just fresh out of ideas at the moment, but there must be a cause that we haven't spotted yet.

[Allocator]

Tarbat, are you getting an alert on range and one of the other factors.  Is a non ADS-B track showing as zero range I wonder?

[tarbat]

That's a possibility.  I'll turn the range alert off and see what happens.

[Tailwinds]

Allocator....

thanks for your reply. I do appreciate your help with this glitch and that you have tried to replicate what's happening. I have to echo tarbat's words by agreeing that it really isn't that important. It's not a problem for me either. I just wanted to know why it was happening. As tarbat says, maybe it's only on non ADS/B Registrations that this is occurring. But then again, it's not happening to you so it's puzzling.

[tarbat]

Tarbat, are you getting an alert on range and one of the other factors.  Is a non ADS-B track showing as zero range I wonder?

Okay, first alert of the day, and it's a double alert, even with range turned off.  So, that's not the solution.

[Blackthorn]

I requested an alert today for registration only of D-AHIL and guess what?

I received a double alert, not that it matters providing I get some sort of alert.

[Allocator]

OK chaps, I've got it now.  It seems to only be happening with Registration alerts.  I put G-B* into the Registration box and immediately got a triple alert, so it is definitely a bug by the looks of it.

I'm almost certain that this isn't an issue with the Mode S and Squawk alerts and I don't know about Flight ID, but I don't think that they give a multiple alert.

So, over to Support.  Please add Registration multiple alerts to you next bug fix please.

[AirNav Support]

We will take a look.

[Blackthorn]

Good old Allocator always on the ball :-)

Many thanks

Kevin