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Last post
run4it
How GPS can kill you
This came from a site called 'Pilot Workshops', which often has some valuable GA tips. But this one just seems to be an illustration of over-reliance on technology which borders on the absurd! Seems to me that any VFR pilot using GPS near an airport should just fuggedaboudit! Obviously IFR pilots have access to ATC and better navaids than their imbecile Garmins: "When we're holding, we have to suspend the navigation of the GPS. A GPS wants to navigate very much like a flight management system; sequentially, from fix to fix to fix. We don't really navigate from anywhere. We're always navigating to somewhere. And as it reaches a fix, a way point, it sequences on to the next one. But obviously, when we hold, we have to suspend that sequencing, and different units do it different ways. We have to be aware of that and we have to be aware of some of the gotchas within it. Even an example with a Garmin, which will give you a hold if it's published, and tell you how to do it. We have to understand perhaps the hold is a procedure turn. Perhaps, as the initial fix for an approach, we have a hold. So the GPS, as you fly across the fix outbound, will suspend because it isn't going to sequence on up to the next, perhaps, the final fix. Say there are just two fixes -- the initial fix and a final fix -- and at the initial fix, we're going to have to do a procedure turn depicted as a hold. So as we cross that fix, the GPS suspends. Now, as we turn inbound, it automatically -- this is a Garmin 430, 530, G1000 -- it automatically will cancel that suspension so when we cross the initial fix now, it sequences on to the final fix. Not a problem. But what if ATC says, Cardinal 88Q, we've got another guy on the approach and he's been there a while but he hasn't canceled, so expect a hold at the initial fix, 4,000 and expect further clearance tomorrow. Now we're up there and we're going to have to hold at this fix. We have to understand it has suspended as we go outbound; as we turn inbound, it has canceled the suspension. We have to re-suspend, and if we don't, as we cross that fix, it will sequence on to the final fix, and if it does that, how are you going to get back? We need to know how to do that if we've made that mistake." (Holy mackerel ! -ed.)
PilotGuy
What the hell is an
What the hell is an apparently non-instrument rated pilot doing flying IFR unofficially courtesy of his GPS in the first place? Far from being an idiot trying to fly IFR with GPS only, they are flying illegally if not instrument rated!
len.emery
len.emery's picture
GPS (as a tool)
I can say this about GPS: Its a good tool, as long as you understand that it just that -a tool. Flying on a hand held non certified GPS is not what I would call a good idea. I use a Garmin GPS 12 for use as a point to point reference ONLY. I.E. It helps me maintain a straight line from A/P its not good for much else. However, I am an aerial photographer, and a GPS ground fix is the fastest way to get to that remote location. I fly in Vermont and there just aren't a lot of ground reference points to use as nav aids up here. That ground fix loaded into my hand held and used as a "GOTO" can't be beat. As for all of you high time IFR guys, well come up to Vermont and I'll let you fly on out to that 100X100 opening in the woods and take a picture for me form 800AGL. Let's see.... ya leave MPV and fly over to Mt. Abraham and take a left. It's just about 5 miles form Lincoln pass on the right next to.........

Len Emery

Len Emery Photography

400 South Street

Springfield VT 05156

www.lenemeryphotography.com