ifr altitudes (pg 6)

Question 1

what are the minimum ifr altitudes

Answer 1

• minimum altitudes prescribed for the flown segment
  if none (from the course)
  
  • mnts 2000’ above the highest obstacle within a 4NM horizontal distance
  • non mnts, 1000’ above the highest obstacle within a 4NM horizontal
    distance

(§91.177)

Question 2

DA / H

Answer 2

Decision Altitude (altitude MSL) / Height (above rwy threshold)

on a VERTICALLY guided instrument approach procedure (i.e. ILS, LNAV/VNAV, LPV) at which the pilot must decide to continue or to go around

Question 3

MAA

Answer 3

Maximum Authorized Altitude

• annotated example “MAA-17000” on ifr charts

Question 4

MCA

Answer 4

Minimum Crossing Altitude

• the lowest altitudes at certain fixes that an airplane must cross when flying in the direction of the higher MEA

Question 5

MDA / H

Answer 5

Minimum Descent Altitude (altitude MSL) / Height (above rwy threshold)

the lowest altitude (MSL) / height (above rwy threshold) to which a descent is authorized on a NON PRECISION approach until the pilot sees the visual references required for landing

Question 6

MEA

Answer 6

Minimum Enroute Altitude

the lowest published altitude between radio fixes which assures ACCEPTABLE NAVIGATIONAL SIGNAL COVERAGE & meets OBSTACLE CLEARANCE requirements

Question 7

what is a MEA gap

Answer 7

Minimum Enroute Altitude gap
- establishes an area of LOSS in navigational coverage
- annotated “MEA GAP” on charts

Question 8

MOCA

Answer 8

Minimum OBSTRUCTION Clearance Altitude

provides obstacle clearance and navigational coverage ONLY UP TO 22 NM of the VOR

Question 9

what about MEAs and MOCAs

Answer 9

• if both an Minimum Enroute Altitude (MEA) and Minimum Obstruction Clearance Altitude (MOCA) are prescribed for a particular route segment,

a person may operate and aircraft LOWER THAN THE MEA, BUT NOT BELOW THE MOCA,

provided the applicable navigation signal are available

• aircraft using VOR, this applies ONLY WHEN the aircraft is within 22 NM of the VOR

Question 10

MORA

Answer 10

Minimum Off-Route Altitude (Jeppesen)

• route MORA
  provided obstruction clearance within 10 NM to either side of airway
  centerlines and within a 10NM radius at the ends of airways
• grid MORA
  provide obstruction clearance within a latitude / longitude grid block

Question 11

MRA

Answer 11

Minimum Reception Altitude

the lowest altitude on an airway segment where intersection can be determined using radio navigational aids

Question 12

MTA

Answer 12

Minimum Turning Altitude

provides vertical AND lateral obstacle clearance in turns over certain fixes

Question 13

MVA

Answer 13

Minimum Vectoring Altitude

• the lowest altitude at which an ifr aircraft will be vectored by a radar controller,
  except as otherwise authorized for radar approaches, departures, and missed approaches
• may be lower than the minimum altitudes depicted on aeronautical charts, such as Minimum Enroute Altitude (MEAs) or Minimum Obstruction Clearance Altitude (MOCAs)

Question 14

OROCA

Answer 14

Off Route Obstruction Clearance Altitude

• provides obstruction clearance within a 1,000’ buffer in non-mnt terrain areas & 2,000’ in mnts areas

Question 15

what may an OROCA not provide

Answer 15

Off Route Obstruction Clearance Altitude

may NOT provide navigation or communication signal coverage

Question 16

how is are MCAs & MTAs depicted on ifr charts

Answer 16

Minimum Crossing Altitude & Minimum Turning Altitude

a flag with a “x” in it

Question 17

how are MEAs depicted on charts

Answer 17

Minimum Enroute Altitude

plain number. i.e. “16000

Question 18

how are gps MEAs depicted

Answer 18

Minimum Enroute Altitude

plain number with a “G”
ex. “17000G”

Question 19

how are MOCAs depicted

Answer 19

Minimum Obstruction Clearance Altitude

with and asterisk in front
ex. *11000

Question 20

how are MRAs depicted

Answer 20

Minimum Reception Altitude

a flag with a “R” in it

Question 21

how are OROCAs depicted

Answer 21

Off Route Obstruction Clearance Altitude

a number with an exponent
ex. 12^5

Question 22

what does “cruise” mean

Answer 22

allocated block of space that u can fly. begins at minimum prescribed ifr altitude and extends to the altitude stated by atc

once u descend AND VERBALLY tell atc, you CANNOT go back up without a clearance

it also allows u to start an approach at the destinatopion without atc telling u “cleared for the approach”

Question 23

“maintain”

Answer 23

stay EXACTLY at the altitude told by atc

Question 24

block altitude

Answer 24

a block of altitudes that allow deviations within it