Class G airspace on sectional charts

Z

ZUM

New Member
How is Class G depicted on a sectional chart? I know that it exists everywhere along the surface up to 1200AGL with the exceptions of:
1. A class B,C,D,E surface areas (easily identified on the chart)
2. class E transition areas where the magenta vignette lowers the base of class E to 700 AGL

What would the markings look like if class G were to extent to the base of 14,500MSL, where class E starts everywhere?

Thanks.
 
I believe you also have those "zipper" looking lines that have altitude numbers on each side (MSL) that state when Echo airspace starts.
 
[ QUOTE ]
I believe you also have those "zipper" looking lines that have altitude numbers on each side (MSL) that state when Echo airspace starts.

[/ QUOTE ]The zipper lines are for where the FAA takes a block of airspace and says that Class G ends at X,000" feet instead of at 14,500 msl or 1200 AGL. You'll usually find them where the terrain would mean that using an AGL figure would have the Class G/E boundary going up and down by hundreds of feet in a very small amount of space. It evens it off.

Class G to 14,500 is shown on the charts by a shaded blue line (like the magenta one that shows Class G ending at 700 AGL). The area inside the hard part of the line shows where Class G goes to the top.

Sorry I don't have a place to put a graphic, but if you go to www.myaiprlane.com and look at the Colorado sectional, you'll find both types in the mountains.
 
Actually to be accurate, there is no depiction of Class G airspace...it exists anywhere not depicted as E, D, C, B, A. The zipper lines, magenta shading, and blue shading lines on a sectional, TAC, or WAC define the bounderies of the class E.
Magenta Shading indicates that class E starts at 700agl
Magenta dotted line indicates class E at the surface
Blue shading is limits of Victor Routes (1200 agl floor of class E)
Blue zipper line is an area where class E abuts G vertically but not at the surface, 700 or 1200 agl

Any area outside of those shadings is class G. Unless a,b.c.d.

This should be the basic idea when trying to understand airspace...G is everywhere that there is nothing else posted. ie when domestic enroute is posted on a sectional (notation on the key "Class E exists 1200' AGL") or when there is a depictation.

Eric
 
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