iFly GPS Forum

I finally got a chance to use the iFly app in the air today. Overall: I'm very impressed. However, I fly out of an airport that's got some high terrain (2000-4000') to one side (about 15 mi. away). And because I was motoring around at 1500-2000, iFly's terrain warning was flashing almost all the time and I had to keep acknowledging popup alert boxes. But here's the thing: 1) I wasn't even flying towards the terrain a lot of the time it was flashing at me; 2) the airspeed of my current plane is 70 mph, so even if I were flying that direction and bent on self-destruction, it would take me almost 15 minutes to pancake myself into said terrain. I had the Terrain Highlights Settings set to the lowest radius (25 nm), and Alert Thresholds was set to the default (Moderate) -- which I just now changed to Relaxed, and maybe that'll help. But can I suggest that terrain warnings should not occur unless the terrain is in the direction of travel? And could we set it to warn us based on minutes-until-intercept? E.g. Warn me if I'm heading *towards* the terrain and within X minutes of getting there. Or at least let me set the radius to less than 25 NM. Or, alternatively, let me set the radius to X *minutes* instead of *miles*. As it is, terrain warnings proved to be more of a distraction than a help. Thanks.

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Powrachute PC 2000; Aventura II; Cherokee 180

Yes, it was flashing red the terrain that was a long distance from my aircraft. BTW, I was not on a flight plan, just flying around.

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Powrachute PC 2000; Aventura II; Cherokee 180

Ergo is correct on stating that alerts should only be triggered for terrain that is X minutes ahead of you (and it is time based, not miles).

You can make the terrain flashing itself less distracting by changing it's mode:

Menu => Setup => Alerts/Warnings => Terrain Alerts => Map Highlights => Mode => Solid

And you can also decrease opacity too, from this menu.

Hopefully "Relaxed" settings work better for you as well.

If you are getting the Pop-up Alert box for Terrain, this should only occur for terrain in front of your, or if you are flying too low.

Also, having a flight plan that at least lists your Airport in it, may also reduce the warnings when you are within 1 mile of that airport.

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Brian Knox, Sr Software Engineer