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AGL
Above ground level (0 at ground level, smaller than MSL)
Difficult to use as a reference because terrain changes
To ensure that the unmanned aircraft center of gravity (CG) limits are not exceeded, follow the aircraft loading instructions specified in the
Pilot’s Operating Handbook or UAS Flight Manual
how to use load factor chart?
Find the degree, multiply it by the weight = LF
After receiving authorization from ATC to operate a small UA near Minot International airport (MOT) while the control tower is operational, which radio communication frequency could be used to monitor manned aircraft and ATC communications
CT-118.2
MSL
Mean sea level (altitude above sea level)
FL
Flight Level
above 18,000 ft MSL
altitudes are measured in flight levels
Add 00 to convert FL number to feet. Ex. FL240 = 24,000 ft MSL
VFR
Visual Flight Rules.
Pilots fly by reference to the ground, while staying away from clouds/fog/reduced visibility
outside needs to be visible
IFR
Instrument Flight Rules.
Pilots fly by reference to the instrumentation available in the cockpit. This requires special training and certification for manned aircraft pilots.
don’t need to see outside
what commercial airline pilots use to fly through clouds/fog
VMC
Visual Meteorological Conditions
Conditions under which VFR or IFR flights are possible
Will only fly in VMC when using drone
IMC
Instrument Meteorological Conditions
Conditions under which are Instrument Flight Rules (IFR) possible
not Drone
Class A
Class Alpha
starts at 18,000ft MSL to FL600
fast jets
not drones

Class B
Class Bravo
upside down wedding cake shape
typically, from the surface to 10,000ft MSL (not always)
setup around the busiest airports
MOSR restrictive type
need to get authorization or clearance prior


Class B Map
Numbers at lines: bottom # = airspace starts, top # = ends
add 00 = 90 = 90,000 ft MSL
center = core = right above airport = have to get approval to fly here
can find MSL of airport by name
airspace starts # - airport MSL = AGL
Blue lines
Class C (IN AGL)
2 layers/volumes
Inner cylinder = 5NM radius = typically from the surface to 4,000 AGL
outer cylinder = 10 NM radius = 1,200ft AGL - 4,000ft AGL
setup around towered airports = have a lot of IFR operations
not as busy airports

Class C map
Class Charlie
magenta lines
top airspace MSL - airport MSL = inner cylinder AGL = how high it is above the ground
Mode C Veil
class B is surrounded by mode C veil
Not an airspace
manned aircraft are req. to be equipped w a mode C transponder (same magenta color dont confuse)
When two classes are together… Ex. class B and C
T (negative sign) = 2,999 MSL FT = top of class C airspace
3,000 - start of Class B

Class Delta
single cylinder = typically from surface to 2,500ft AGL
radius varies on airport
airports that are busy enough to warrant a control tower

Class D Maps
dotted/dash blue line
if airport is at high MSL = airspace MSL - airport MSL = 2,500 AGL

Class D control towers only operate during the…
Day
once tower shuts off, airspace reverts to Class E or Class G
Class Echo
everything that is controlled and not A, B, C, or D
most of the airspace of national airspace
1200ft AGL unless otherwise designated
some exceptions with starting at 14,500ft MSL
can sometimes start at 700ft AGL, surface
manned aircraft are likely to be using their onboard instruments
not req. to get authorization but E2
depicted by zipper lines

Class E maps
class E1 = solid shaded blue line surrounding the US map (one side is darker than the other, same line)
lighter = starts at 1,200 ft AGL
darker = 14,500 ft MSL
class E5 = shaded magenta line
lighter = 700ft AGL
darker = 1,200ft AGL
Dashed magenta line (E2, E3, E4)
from the surface
Class E1
Class E at and above 14,000 ft MSL
dark blue shaded line
Class E2
class E designated as a surface area for an airport
ONLY ONE that needs authorization
common
primary to airport
No extension of any class
dashed magenta line
Class E3
Class E designated as an extension to a class C surface
dashed magenta line
Class E4
Class E designated as an extension to a class D or class E surface area
common
dashed magenta line
Class E5
Class E extending upward from 700ft - 1,200ft AGL or more above the surface
shaded magenta line
Straight magenta line w numbers
NOT class E = magnetic variation line
Class G
Golf Airspace
everything else that’s left
uncontrolled airspace = free for all
below class E
not represented on the sectional chart
does NOT req. approval

Class G maps
surface - 1,199 ft AGL (light of blue line)
surface - 14,499 ft AGL (dark of blue line)
surface - 699ft AGL (light of magenta line)
surface - 1,199 ft AGL (dark of magenta line)

What do the numbers following AWOS in a map mean?
the weather. 135.075 MHz
Obstacles
wind turbines
triangle looking with dot
will have MSL number (bottom is how tall the obstacle is)
MSL - AGL = base of obstacle in MSL
mines
powerlines
diamonds = stadiums
R in a circle = private airports
MOA areas
Military and government areas
Alert Areas
A-#
Restricted areas
R - # letter
blue comb
see table for information
assume it’s from the surface if it starts to
Line of variation
dashed magenta lne
EX. 11*30E
11 degrees 30 minutes E variation
Where can you find airport infromation
chart supplements
notices to air missions (NOTAMS)
ATIS (Automatic Terminal Information System)
Aeronautical Charts
Charts Supplements
provides detailed info for each airport
formerly called airport/facility directory (AFD)
nine regions
What are the sections of Chart Supplements
Legend
Airport/Facility Directory (by state)
notices (major changes since it was last published)
associated data (phone #, freq. forms, etc)
airport diagrams
What classes do you need clearance from the ATC?
B, C, D or within the lateral boundaries of the surface area of Class E
What classes do you noy need formal clearance to enter but you need to establish a two-way radio communication with the ATC
C and D