GPS in lieu of DME

[dmspilot]

No need. The OP did have GPS. But it’s not required for the Approach. I was looking at from that angle. And yeah, I’m getting hypothetical. Food for thought.

So...if the wind changes, that will mess up a timed MAP anyway, right? Maule's technique doesn't seem any worse if you think of it that way. Both are equally reliant on groundspeed precision and time, one way just doesn't use a clock.

 

[midlifeflyer]

That’s a great point. I was hyper-focused on DME distance and didn’t consider distance from runway which would be sequenced (and distance shown) in the navigator.

Fixation (and its negative effects) isn’t just an instrument issue

 

[midlifeflyer]

I think things got a bit too hypothetical here:

Using GPS in lieu of DME to identify the FAF in case the MAP is timed...why would it be timed if we have GPS?

For that matter, it wouldn’t be timed if it required DME either. Unless your SOP was to time every approach regardless of type.

But the issue comes up anyway. Emergency scenario where you lose course guidance and need to at least guesstimate the MAP.

 

[luvflyin]

So...if the wind changes, that will mess up a timed MAP anyway, right? Maule's technique doesn't seem any worse if you think of it that way. Both are equally reliant on groundspeed precision and time, one way just doesn't use a clock.

True