Cambridge FR, Sector OZ, Badges

I understand the characteristics of the Sector OZ and the Cylinder OZ,
and for my badge flights, I would prefer to use the Sector OZ. An RAS
thread back in 2000 (before I started flying) seems to indicate that
Cambridge FRs are "hard wired" to the Cylinder OZ. I have a 302A CFR.
Does that mean I'm stuck with Cylinder OZ's, or can you "declare"
intent to use Sector OZs in some way when making badge flights?

TIA
Jim

There are a couple of threads on this topic...from
a few years ago. I went through them looking for the
same information you are. Unless something has changed
recently...you have to get into the sector...which
means flying past the cylinder. This technique was
described by a couple of different pilots in these
old threads. Googling should dig out these old posts.
Good luck.

On Jul 19, 10:01 am, james.d.wynh...@saic.com wrote:
> Cambridge FRs are "hard wired" to the Cylinder OZ. I have a 302A CFR.
> Does that mean I'm stuck with Cylinder OZ's, or can you "declare"
> intent to use Sector OZs in some way when making badge flights?

There is no need to declare the type of OZ to use. Just be sure that
all your TP approaches are of the same type.

Are you using a PDA to navigate from the data stream provided by the
302A? Then the PDA map will get you to the right place.

I don't recall whether the 302 can be set up to beep when within a
predefined distance to the TP (I have a 302, but use the PDA to
navigate, so never bothered to see if that was possible). If it can,
then you could use it to fly a cylinder OZ type task.

If you want to fly a sector OZ type task, then you must have at least
a display that provides bearing to the TP that will help you get to
the right place. If you have no display, then your TPs had better be
easily identifiable places, and you must be very sure you are in the
OZ before changing course.

If you are using a different source of GPS info, perhaps a handheld,
to navigate, then you must again be sure not to barely clip the OZ, as
the two GPS devices could be off by a few hundred feet. So even
though the handheld unit claims you were barely within the OZ, the IGC
FR may still be showing a position outside the OZ.

-Tom

On Jul 19, 12:01 pm, james.d.wynh...@saic.com wrote:
> I understand the characteristics of the Sector OZ and the Cylinder OZ,
> and for my badge flights, I would prefer to use the Sector OZ. An RAS
> thread back in 2000 (before I started flying) seems to indicate that
> Cambridge FRs are "hard wired" to the Cylinder OZ. I have a 302A CFR.
> Does that mean I'm stuck with Cylinder OZ's, or can you "declare"
> intent to use Sector OZs in some way when making badge flights?
>
> TIA
> Jim
If you're flying with (for example) Glide Navigaor II, you can select
an option to "show FAI sectors" under the task menu item.

A trick I used for a really important 500K triangle flight when I was
just using the GPS-NAV LCD display was to set up a "shadow" waypoint
within the sector. As I got close to the turnpoint, I would navigate
to the shadow waypoint instead. When it said "0" distance to go, I
knew I was in the FAI sector.

So if Turnpoint 1 was Smith Airport (which is what was in the
declaration), I had Smith Airport Sector (actually Smthaptsector) in
the database as well. That's really overkill, since you can usually
eyeball it, but it it's really that important...