ifr altitudes Flashcards
DA / H
Decision Altitude/ Height
Altitude (MSL) / Height ( above runway threshold)
on a vertically guided instrument approach procedures (ILS, LNAV/VNAV, LPV, etc) at which the pilot must decide weather to go kissed or continues the approach or to go around
MAA
Maximum Authorized Altitude
depicted on on ifr charts as “MAA- 17000” (example of 17000 ft)
MCA
Minimum Crossing Altitude
the lowest altitude at certain fixes that an airplane must cross when flying in the direction of a higher MEA
MDA / H
Minimum Descent Altitude / Height
Altitude (the lowest altitude MSL) / Height (above runway threshold)
to which descent is authorized on a non-precision approach until the pilot sees the visual references required for landing
MEA
Minimum Enroute Altitude
- the lowest published altitude between radio fixes which assures ACCEPTABLE NAVIGATIONAL SIGNAL COVERAGE and meets OBSTACLE CLEARANCE requirements
- an MEA gap establishes an area of loss in navigational coverage and is annotated “MEA GAP” on ifr charts
MOCA
Minimum Obstruction Clearance Altitude
provides obstacle clearance and navigation coverage up to 22 NAUTICAL MILES OF THE VOR
what about both MEA & MOCA
Minimum Enroute Altitude & Minimum OBSTRUCTION Clearance Altitude
if both are prescribed for a particular segment, a person may operate an aircraft lower than the MEA down to BUT NOT BELOW the MOCA, provided the applicable navigation signals are available
for aircraft using VOR for navigation, this applies only when the aircraft is within 22 NM of the VOR (§91.177)
MORA (Jeppesen)
Minimum Off Route Altitude
- ROUTE MORA provides obstruction cleaned with in 10NM to either side of airway center lines & within a 10NM radius at the ends of the airways
- GRID MORA provide obstruction clearance within a latitude/ longitude grid block
MRA
Minimum Reception Altitude
the lowest altitude on an airway segment where intersection can be determined using radio navigational aids
MTA
Minimum Turning Altitude
provides vertical and lateral obstacle clearance in turns over certain fixes
annotated with the MCA X icon and a note describing the restriction
MVA
Minimum Vectoring Altitude
the lowest altitude at which an ifr aircraft will be vectors by a radar controller , except as otherwise authorized for radar approaches, departures, and missed approaches
MVAs may be lower than the minimum altitudes depicted on aeronautical charts as MEAs or MOCAs
ORCA
Off Route Obstruction Clearance Altitude
provided obstruction clearance within a 1000’ buffer in non mountainous terrain areas and 2000’ in mountainous areas
it may not provide navigation or communication signal coverage
how is an ORCA depicted on charts
Off Route Obstruction Clearance Altitude
a large number and an exponent
how is a MEA depicted on a chart
Minimum Enroute Altitude
plain number i.e. 16000
**if it’s a GPS MEA “16000G” with a G on the end
how is a MOCA depicted on charts
Minimum Obstruction Clearance Altitude
*16000
and ASTERISK IS IN FRONT
