Hey people. I was just searcing the wonderful World Air Routes site and I noticed this wierd picture from a DVD I am purchasing later today, I am wondering what those green arches stand for? maybe ADF freqs? I am completely at your explaination to this. I can't wait to get this DVD. Seeing as I've seen several Sobelair 763's (OO-SLR) at EBBR and the Sobelair 738 :-) also! Thanks guys!http://www.worldairroutes.com/images/SLR12.jpg © Worldairroutes"... AND I'M PROUD TO BE AN AMERICAN!"[b/]

HmmmmJust a thought but lines of magnetic variation perhaps?Like I said just a guess.

Could they be large DME circles drawn around fixes with the FIX pages?Lee Hetherington (KBED)http://vatsim.pilotmedia.fi/statusindicato...tor=OD1&a=a.jpg

They look like DME rings around fixes to me as well.

I have to agree with the other gentlemen. I bet they are fixes for ETOPS ranges. I have the World Air Routes Air Seychelles DVD and on it they have an explanation on the 737-700 where they have 400 miles rings on the ND to show the portion of the trip flown under ETOPS rules. Could do the same on the 767.Ben

where do I find out about these type of 'in cockpit' DVD's??

hey sumner,yes they are DME arcs with a certain distance(displayed at the arc, they are actually entire circles/ellipses) They are created through the FIX page on the FMC. In this case they are DME arcs from certain fixes, i heard once that pilots even put in their alternates and then use as distance their assumed ETOPS range(accounting for wind and TAS) to use as a reference. Normally the ETP's(=equal time point) are put in as a reference waypoint only. SO my guess is they represent the ranges from/to enroute alternates(in this case it's a flight to Varadero(i thought, to the carribean area anyways) so this is probably Santiago and Santa Maria(Santiago=nort-western tip of spain, Santa Maria(LPAZ) is located offset to the east of the middle of the Atlantic).Could be wrong though, yet these things are mostly company defined so you'll need to find a Sobelair Captain to answer this question to it's fullest truth... chances are slim mate!On another note:I SOLOED TODAY :D(gliderplane)... feeling is AWESOME!!

I think he should trim his nails and not smudge the glass....Arcs are very useful and can be inserted for any number of reasons such as crossing restrictions, ETOPS and such.Another nifty trick in the real world is to "box" in sigmets/airmets using route two to make the box as an overlay-not sure if u can do this in PIC767 though.Tim757

http://forums.avsim.com/user_files/18663.jpgIt's possible, but the arcs are not drawn correctly or is it simply because my range is set so low?Cheers

definitely-it

Sorry for the long time before I responded, had to pack up the network since I am moving and such. Well, I can see how that makes sense. It probably has to do with ETOPS so they know where they are and according to company policy if something happens that they need to divert they can simply refer to hte 'fixes' page and divert accordingly with regards to PED-Point of Equal distance-. Thanks guys, I'll just have to wait till next week when my dvd arrives to find out and I'll tell you all! :-)"... AND I'M PROUD TO BE AN AMERICAN!"[b/]

>to PED-Point of Equal distance-.Hmm, it's usually referred to as ETPs, Equal Time Points, because time is more important than distance (at least ground distance) considering winds.Martin767 fetishistIt's a lot like life and that's what's appealing

Yup, they're just range rings from places in the FIX page. It is general practice to have your two closest available airports in the fix page incase you need to divert there in a hurry, having rings round them like that gives you an awareness of which is closer. These may well not be ETOPS adequate airports, but airports to be used in the event of fire etc. I'm sure the same thing would be done in 4-engine non-ETOPS aircraft. ETOPS is largely a pre-flight planning issue, once airborne common sense and airmanship will dictate what to do when something fails!

Well i didnt know what they were at all so i asked,They are range marks manually entered around any waypoint or beacon, apparently you cant enter more than 511 miles ( no idea why )