flying_John
New member
I have some questions on Class E airspace.
1. Blue edge E airspace
Reviewing sectional charts, I didn' find Blue edges of E airspace except countries boundaries and a few in Montana and Idaho. Does that mean that most of USA Class E airspace starts at 1200AGL, 700AGL or surface?
If so, what's the benefit of designating the Blue edges of E airspcace in mountain area in Montana and Idaho? As most of those area's elevation is beyond 10,000ft, adding 1200AGL is almost close to 14,500ft.
2. E airspace around uncontrolled airports
Uncontrolled airports with ILS approach seem to have Class E from surface around them. Those without ILS but with RNAV or VOR approach have Class E from 700AGL. But RNAV approach MDA is lower than 700GL. For example, 98D@(Onida Municipal Airport) has E airspace from 700AGL.
RNAV MDA is 2140ft (261AGL). so how is safety of instrument flying in IMC in uncontrolled airspace below 700AGL ensured?
3. Take off from uncontrolled airports without IAP
Pilots are allowed to fly IFR from those airport obtaining their clearance over their phone. In this case, again IFR flying in uncontrolled airspce from liftoff upto Class E floor. Same question as above.
1. Blue edge E airspace
Reviewing sectional charts, I didn' find Blue edges of E airspace except countries boundaries and a few in Montana and Idaho. Does that mean that most of USA Class E airspace starts at 1200AGL, 700AGL or surface?
If so, what's the benefit of designating the Blue edges of E airspcace in mountain area in Montana and Idaho? As most of those area's elevation is beyond 10,000ft, adding 1200AGL is almost close to 14,500ft.
2. E airspace around uncontrolled airports
Uncontrolled airports with ILS approach seem to have Class E from surface around them. Those without ILS but with RNAV or VOR approach have Class E from 700AGL. But RNAV approach MDA is lower than 700GL. For example, 98D@(Onida Municipal Airport) has E airspace from 700AGL.
RNAV MDA is 2140ft (261AGL). so how is safety of instrument flying in IMC in uncontrolled airspace below 700AGL ensured?
3. Take off from uncontrolled airports without IAP
Pilots are allowed to fly IFR from those airport obtaining their clearance over their phone. In this case, again IFR flying in uncontrolled airspce from liftoff upto Class E floor. Same question as above.
