Aerodrome Obstacle Charts: Type A
Thread Starter
Joined: May 2000
Posts: 158
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From: Norway
Aerodrome Obstacle Charts: Type A
Just to double check; the obstacle heights published on ICAO AOC: Type A...... they DO NOT include 35' (10,6m) obstacle clearance, or do they?
The reason I'm asking is that I'm finding discrepencies between "normal" state published charts of heights (non-aviation charts) and the ICAO AOC Type A obstacle heights publised for the same obstacles.
Any takers?
The reason I'm asking is that I'm finding discrepencies between "normal" state published charts of heights (non-aviation charts) and the ICAO AOC Type A obstacle heights publised for the same obstacles.
Any takers?
Fleet Manager
Joined: Apr 2001
Aviation Qualifications: ATPL
Posts: 7,448
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From: various places .....
(a) no charts incorporate the NFP clearance .. would be a meaningless exercise
(b) the discrepancies are to be expected .. different accuracies and source data, etc. Type A is from a specific survey and probably is going to be the more accurate source of data.
(b) the discrepancies are to be expected .. different accuracies and source data, etc. Type A is from a specific survey and probably is going to be the more accurate source of data.
Thread Starter
Joined: May 2000
Posts: 158
Likes: 0
From: Norway
Yes, you're right of course. It would make it very difficult to use performance charts with a 0/0 reference point.
(Call it wishfull thinking on my behalf; I just couldn't get the damn thing over the 5.2% net gradient the obstacle required with any reasonable payload....) Would have been nice to knock of 10,6meters....
(Call it wishfull thinking on my behalf; I just couldn't get the damn thing over the 5.2% net gradient the obstacle required with any reasonable payload....) Would have been nice to knock of 10,6meters....
