modesto2
Posts: 2689
Joined: Sun Jul 16, 2000 3:44 am

Dotted Green Arc

Wed May 23, 2001 5:03 am

After looking at some in-flight cockpit photos of the 744, I've noticed a dotted green arc that spans the ND. What is it? Thanks.
 
JT-8D
Posts: 423
Joined: Sun Dec 31, 2000 11:34 pm

RE: Dotted Green Arc

Wed May 23, 2001 5:06 am

Not sure what ND is, but if its like a vsi, the green arc is the tcas ra(resolution advisory). Should be a red arc also, which tells them where not to go..JT
 
AAR90
Posts: 3140
Joined: Fri Jan 21, 2000 11:51 am

RE: Dotted Green Arc

Wed May 23, 2001 9:13 am

ND = Navigation Display.
I've never seen a "dotted green arc." However, a dashed-line green arc can be drawn by inserting a distance from a point on the FMC's Fix page. The result is a circle around the fix at the prescribed distance. Zoom in with the fix not at the center of the ND and it can easily be viewed as an arc. Commonly used to show altitude restrictions based upon a distance during approach or departures.
*NO CARRIER* -- A Naval Aviator's worst nightmare!
 
cdfmxtech
Posts: 1319
Joined: Wed Jul 05, 2000 11:37 am

RE: Dotted Green Arc

Thu May 24, 2001 3:48 am

I think AAR90 hit on this already. There is a green arc which is solid, not dotted that shows the point that the aircraft will capture the selected altitude.
 
modesto2
Posts: 2689
Joined: Sun Jul 16, 2000 3:44 am

RE: Dotted Green Arc

Thu May 24, 2001 5:49 am

Look at the ND, you can see the green arc.


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airplay
Posts: 3369
Joined: Sat Oct 25, 2003 1:58 am

RE: Dotted Green Arc

Thu May 24, 2001 9:54 am

Oh!

THAT green arc.

 Smile

That segmented green line represents a boundary of a terminal area or other such navigation deliniation. It is part of the MAP display along with the little blue navaid symbols. If the display was "zoomed" out (Range changed) you would probably see a full circle or occasionally some other complex shape representative of the area boundary that it represents.

 
JT-8D
Posts: 423
Joined: Sun Dec 31, 2000 11:34 pm

RE: Dotted Green Arc

Fri May 25, 2001 4:13 pm

Definition problem--lol. We call that the ehsi, or just hsi..JT

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