Finding a Preferred Route with CFS

It’s as easy as 123.

Look at your CFS edge-on, opposite the spine. You will see colour-coding bands. (Actually, they are just black ink) ((And if you are accessing he CFS electronically you are SOL with the bands))

The big band in the middle is of course airports, arranged alphabetically for easy access. Except St. Lazare is listed under Montreal as Montreal St. Lazare while Lachute is listed under, well, Lachute. The pages are all called B-something.

But you want the next section, or band. That section is called planning and all its pages are called C-something. Page C-1 has a Table of Contents. There is no mention of preferred routes – but there is a section called Mandatory IFR Routes.

Notice that their aim is to guide pilots in planning their route of flight, and also that pilots are responsible for ensuring that the filed altitude will meet the obstacle clearance requirements, that the navigation signal coverage is adequate and that the route will not penetrate Class F airspace.

CAR 601.01 – 601.09 address operations in Class F airspace. Two things to know about Class F – advisory airspace (CYA-something):

  • pilots need permission from the designated somebody
  • controllers cannot clear an IFR flight into a Class F – advisory airspace (CYA-something)

OK. Now we have to see if our routes have a preferred – whoops, mandatory route listing. Because they are less than 250 NM, they probably do.

The mandatory routes are listed by Flight Information Region, going from west to east. So, page through until you find CZUL Montreal FIR, which is after CZYZ Toronto FIR.

OK. Here we are on page 1516 of 1684. But that’s just this edition of the CFS. There is a new CFS published every 56 days. Page numbers may be different next time.

Let’s see if we can find something for our first route, CYHU to CYND. We can look under CYHU DEP TO or CYND ARR FR. And with the C172, we want L. Or H&L.

Hey – both of our routes are on this page!

  • for CYHU to CYND, we have CYHU H&L DEP TO CYND – KESKA ALSET THURO
  • for CYHU to CYQB, we have CYHU H&L DEP TO CYQB – ADVEM OMVAR ARR

Are you still with me? That was a piece of cake, right?

Now we just have to plot those waypoints on a chart and find out about OMVAR ARR, whatever that is . . .

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