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1.7.2 Except as provided in 14 CFR Section91.157,
Special VFR Minimums, no person may operate an
aircraft beneath the ceiling under VFR within the
lateral boundaries of controlled airspace designated
to the surface for an airport when the ceiling is less
than 1,000 feet. (See 14 CFR Section 91.155(c).)
1.8 VFR Cruising Altitudes and Flight Levels
(See TBL ENR 1.4-2.)
ENR 1.4-2 AIP
15 MAR 07 United States of America
Nineteenth Edition Federal Aviation Administration
TBL ENR 1.4-1
Basic VFR Weather Minimums
Airspace Flight Visibility Distance from Clouds
Class A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Not Applicable Not Applicable
Class B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 statute miles Clear of Clouds
Class C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 statute miles 500 feet below
1,000 feet above
2,000 feet horizontal
Class D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 statute miles 500 feet below
1,000 feet above
2,000 feet horizontal
Class E
Less than 10,000 feet MSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 statute miles 500 feet below
1,000 feet above
2,000 feet horizontal
At or above 10,000 feet MSL . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 statute miles 1,000 feet below
1,000 feet above
1 statute mile horizontal
Class G
1,200 feet or less above the surface (regardless of MSL altitude).
Day, except as provided in 14 CFR Section 91.155(b) . . . . . . . . 1 statute mile Clear of clouds
Night, except as provided in 14 CFR Section 91.155(b) . . . . . . . 3 statute miles 500 feet below
1,000 feet above
2,000 feet horizontal
More than 1,200 feet above the surface but less than 10,000 feet
MSL.
Day . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 statute mile 500 feet below
1,000 feet above
2,000 feet horizontal
Night . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 statute miles 500 feet below
1,000 feet above
2,000 feet horizontal
More than 1,200 feet above the surface and at or above 10,000
feet MSL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 statute miles 1,000 feet below
1,000 feet above
1 statute mile horizontal
TBL ENR 1.4-2
VFR Cruising Altitudes and Flight Levels
If your magnetic course
(ground track) is:
And you are more than 3,000 feet above the
surface but below 18,000 feet MSL, fly:
And you are above 18,000 feet MSL
to FL 290, fly:
0  to 179  . . . . . . . . . . . . . . . Odd thousands MSL, plus 500 feet (3,500;
5,500; 7,500, etc.)
Odd Flight Levels plus 500 feet
(FL 195; FL 215; FL 235, etc.)
180  to 359  . . . . . . . . . . . . . Even thousands MSL, plus 500 feet
(4,500; 6,500; 8,500, etc.)
Even Flight Levels plus 500 feet
(FL 185; FL 205; FL 225, etc.)
AIP ENR 1.4-3
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
2. Controlled Airspace
2.1 General
2.1.1 Controlled Airspace. A generic term that
covers the different classification of airspace
(ClassA, ClassB, Class C, Class D, and Class E
airspace) and defined dimensions within which
airtraffic control service is provided to IFR flights
and to VFR flights in accordance with the airspace
classification. (See TBL ENR 1.4-3 for Airspace
Classes). Airspace classes are pronounced in the
ICAO phonetics for clarification. The term “class”
may be dropped when referring to airspace in
pilot/controller communications.
2.1.2 IFR Requirements. IFR operations in any
class of controlled airspace requires that a pilot must
file an IFR flight plan and receive an appropriate ATC
clearance.
2.1.3 IFR Separation. Standard IFR separation is
provided to all aircraft operating under IFR in
controlled airspace.
2.1.4 VFR Requirements. It is the responsibility of
the pilot to insure that ATC clearance or radio
communication requirements are met prior to entry
into Class B, Class C, or Class D airspace. The pilot
retains this responsibility when receiving ATC radar
advisories. (See 14 CFR Part 91.)
REFERENCE-
14 CFR Part 91.
2.1.5 Traffic Advisories.Traffic advisories will be
provided to all aircraft as the controller's work
situation permits.
2.1.6 Safety Alerts. Safety Alerts are mandatory
　
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