NDB Approach Lateral Deviation

[aviationluver]

I'm reviewing aviation material. I was going over instrument appr. I was wondering in Europe and other parts of the world...what is considered being laterally off course for an NDB approach to where a go around would be necessary?

I can't remember what the answer is for in the states.

I was watching this video and the video seems to imply that 8 degrees or 10 degrees is considered out of bounds and would cause a need to go around during an NDB approach.

See time mark 32:14 of this video.

https://www.youtube.com/watch?v=dFaQvtDVxBs&index=10&list=PLcSoIFYnPOAg5vaK-C9ke-sJt2HlkRHWP

Your thoughts.

[pineteam]

5 degrees in our SOP which is ridiculously low considering how much the needle fluctuates in the real world. In the sim it's doable tho.

[Capn Bloggs]

Your regulator will dictate what is acceptable. For example (Australian AIP):

ENR 1.5 Section 1.21.2
Can't descend on Final until "established", defined as:
Note: “Established” means being within half full scale deflection for the ILS, VOR and GNSS, within ±5° of the required bearing for the NDB, or within ±2NM of the DME arc.

5 degrees in our SOP which is ridiculously low considering how much the needle fluctuates in the real world. In the sim it's doable tho,
Here here!

[Feather44]

The values shown on the tabular at 32:14 are the App Procedure DESIGN

If I'm not mistaking, for NDB/VOR App, a lateral deviation exceeding 5° calls for a GA

[pineteam]

Totally agree with you TangoAlphad.

[Pugilistic Animus]

With those dern NDBs one is constantly flying tiny S turns

[Centaurus]

Anecdotal evidence reveals the New Zealand CAA tolerance in their particular manual for a DME arc, is plus or minus 2.5 nm. That seems reasonable. Yet in flight tests, some Examiners/ ATO's fail a candidate if he is outside plus or minus 1.5 NM which is ridiculous. If true, each Examiner seems to have his own ideas..

[aterpster]

Anecdotal evidence reveals the New Zealand CAA tolerance in their particular manual for a DME arc, is plus or minus 2.5 nm. That seems reasonable. Yet in flight tests, some Examiners/ ATO's fail a candidate if he is outside plus or minus 1.5 NM which is ridiculous. If true, each Examiner seems to have his own ideas..
The FAA instrument rating standard for a DME arc is plus or minus 1.0 n.m.

[Pugilistic Animus]

Both DME ARC transitions and NDB approaches require a little bit of "Kentucky Windage"