The YSCH NDB appraoch is a circling approach which is where the final approach course is offset more that 30 degrees to the runway heading. This approach is restricted to Cat A and B aircraft with a maximum speed of 140 KIAS on the outbound leg. I've seen a lot of similar approaches in my military flying days where the norm was to fly an ADF (NDB)appraoch. It's really a fairly simple approach even in the mighty Herc. ADF/NDB approaches are very good approaches.

 

Billy Bluestar

It's probably also offset as it appears to be a VOR or NDB approach without DME. This means you can't have the approach over terrain as you can't have a "not below 2000ft until 5nm" sort of restriction. The solution is to put it out over the water.

Hi Iain

 

As you can see it as a circling approach to that runway. Since there is no DME there no way get a desecnt profile over the obstacle, as you descend as fast as possible to the approach minimum and hope to get visual. So they will move the inbound course to clear the obstacles makeing it a circling approach.

 

The approach is a CAT A and B. 737 is CAT C and Single Engine Circling its CAT D

 

Regards

Chris Finlay