IFR TERMS

Question 1

Approach Corridor

Answer 1

Airspace designated for safe maneuvering during an instrument approach, ensuring obstacle clearance.

Question 2

Area Navigation (RNAV) “T” Route

Answer 2

Direct RNAV routes for efficient and safer airspace use.

Question 3

Circle-to-Land

Answer 3

Maneuver to land on a different runway when straight-in isn’t possible.

Question 4

Decision Altitude (DA)

Answer 4

Altitude at which the pilot must decide to land or go missed during an approach.

Question 5

Decision Height (DH)

Answer 5

Height above runway where a landing decision is made on precision approaches.

Question 6

Feeder Routes

Answer 6

Transition routes from en route airspace to an approach fix.

Question 7

Full Approach

Answer 7

Entire procedure needed to establish on final approach.

Question 8

Initial Approach Fix (IAF)

Answer 8

Start of the initial segment of an instrument approach.

Question 9

Intermediate Fix (IF)

Answer 9

Fix marking the start of the intermediate approach segment.

Question 10

Minimum Descent Altitude (MDA)

Answer 10

Lowest altitude for non-precision approach without visual contact.

Question 11

Missed Approach Point (MAP)

Answer 11

Point where a missed approach must begin if no runway in sight.

Question 12

Nonprecision Approach Procedure

Answer 12

Approach without vertical guidance (e.g., VOR, GPS).

Question 13

Precision Approach Procedure

Answer 13

Approach with both lateral and vertical guidance (e.g., ILS).

Question 14

Standard Instrument Approach Procedure (SIAP)

Answer 14

Predefined maneuvers for an instrument approach.

Question 15

Stepdown Fix

Answer 15

Fix allowing further descent while clearing obstacles.

Question 16

Minimum Reception Altitude (MRA)

Answer 16

Lowest altitude to receive a navigation signal at a fix.

Question 17

Maximum Authorized Altitude (MAA)

Answer 17

Maximum altitude for a specific route segment.

Question 18

Minimum Obstruction Clearance Altitude (MOCA)

Answer 18

Lowest altitude ensuring obstacle clearance and signal reception.

Question 19

Off Route Obstruction Clearance Altitude (OROCA)

Answer 19

Altitude providing obstruction clearance on off-route areas.

Question 20

Minimum Turning Altitude (MTA)

Answer 20

Altitude ensuring obstacle clearance during turns.

Question 21

Minimum Crossing Altitude (MCA)

Answer 21

Lowest altitude to cross a fix while meeting clearance requirements.