INS app sybol
 

Alright, I got another one here for you IFR minded folks. So, in reviewing an approach (KBUR 8 ILS) I noticed that there is a difference in symbols.

http://204.108.4.16/d-tpp/0713/00067I8.PDF

Is the plate in question...

VNY to SILEX has the same symbol as FIM to TOAKS
But VTU to TOAKS doesnt have the same thick to thin line. Why?

On the JEPP plates, its a sold bold line that goes to a gray shaded line, just like on the NACO charts.

Hope this question makes sense, looks like something important and could be on interviews as we...

VNY to SILEX just like LAX to SILEX are feeder routes to the IAF. FIM and VTU can be used as IAF's for the approach. Size/color of line from FIM to TOAKS varies in order to make the radial (136 off of FIM) also useable to ID TOAKS. Radials from LAX and VNY are also/can also be used to ID intersections on the approach.

Ex. You are using VTU as your IAF, ATC says report TOAKS, how can you ID where TOAKS is (amongst other ways) Intersection of the FIM R-136 and the localizer off of I-BUR. TOAKS cannot be ID'd off the intersection of the VTU R-054.

Thats my take on it at least, hope that makes sense. If anyone else has an opinion on it, please advise.

That all makes sense, except for lets say your flying the feeder route off of FIM, why could you not use VTU to help identify TOAKS?

I think it's the angle that the two radials intercept, not giving a as exact or clear of an intersection as is desired for the approach.

It appears that the VTU radial, for whatever reason, does not define TOAKS, unlike the other examples which define SILEX. I haven't seen an intersection with three defining radials before, and I'm not sure why they did it that way.

Yeah like king said, at the very least just know, VTU does NOT define TOAKS.

That all works for me. At this point, I'm just looking to see if there is some trick about this approach that would be good to know, or that I should be aware of.....

You don't need to use all three to ID the fix, it's just giving you multiple options. You use the LOC and one other published radial.

VTU's 054' radial is strictly a transition to intercept the localizer. Also note the "NoPT" for that transition, as with the same if you came off of FIM.

You can also use LAX or VNY as transitions, but both conditions you must do the procedure turn.

The way it is drawn, at least to me, is that SILEX can only be identified by the cross-radial off of LAX, notice that the line goes through the course, where-as the line from VNY does not.(Compare this to the VTU and FIM transitions, FIM goes through, VTU does not) I'm not 100% on this, but for the simplest description, I'd stick with it, the angle also from VNY is 30 degree's in relation to the LOC, could leave a lot of room for error in my mind also.

Anyone else notice the MAP? That's one very complicated and detailed missed!!! I could see that getting a lot of people in trouble

I agree with Ewfflyer, the FTU 054 looks like it will intersect with TOAKS but the line ending in the localizer field denotes that it can't be used for that purpose. You'll notice that FTU is another IAF and used to intercept the LOC with another receiver an avoid the HILO.