TD 48

Question 1

Indicated Altitude:

Answer 1

The altitude read on the dial with a current altimeter setting set in the Kollsman Window

Question 2

Pressure Altitude:

Answer 2

The height above the standard datum plate, which is 29.92 set in the Kollsman Window. Used above 18,000’ and referred to as Flight Levels

Question 3

Density Altitude:

Answer 3

The altitude for which a given air density exists in the standard atmosphere

Question 4

MIA

Answer 4

Minimum IFR altitude:

Defined as MEA on airways, or MOCA if within 22 NM of a VOR, or minimum altitude published on approach plate

Question 5

MEA

Answer 5

Minimum Enroute Altitude:

Lowest altitude between radiofixes which assures navigational coverages and meets obstacle clearances

Question 6

MOCA

Answer 6

Minimum Obstruction Clearance Altitude:

The lowest published altitude between 2 radiofixes etc. which meet obstacle clearance for the entire route, and NAV coverage only 25 NM of a VOR

Question 7

OROCA

Answer 7

Off Route Obstacle Clearance Altitude:

Provides obstruction clearance (plus 1000, 2000 and 3000 ft) within each long/lat quadrant on IFR charts

Question 8

MRA

Answer 8

Minimum Reception Altitude:

Lowest altitude at which an intersection can be determined

Question 9

MCA

Answer 9

Minimum Crossing Altitude:

Lowest altitude at certain fixes at which aircraft must cross when proceeding in the direction of a higher MEA

Question 10

MVA

Answer 10

Minimum Vectoring Altitude:

Lowest MSL altitude at which aircraft can be vectored by radar controller

Question 11

Is an aircraft navigating by IFR-approved GPS considered to be a performance-based navigation (PBN) aircraft?

Answer 11

Yes

Question 12

What is the Primary Route Width (NM) for the following GPS modes:

A. En Route
B. Terminal
C. Approach

Answer 12

En Route: 2.0

Terminal: 1.0

Approach: 0.3-1.0

Question 13

What is a Fly-by Waypoint?

Answer 13

Connects the two segments by allowing the aircraft to turn prior to the current waypoint in order to roll out on course to the next segment

Question 14

What is a Fly-over Waypoint?

Answer 14

Used when aircraft must overfly the waypoint prior to starting a turn to next course

Question 15

Are slight differences between GPS and the charted magnetic course data considered acceptable? Why?

Answer 15

Yes it is normal and resulting from the RNAV algorithm. Actual ground track will be comparable to the charts

Question 16

Explain the difference between homing and tracking inbound to a station. Which procedure should be used on IFR flights when cleared “direct”?

Answer 16

Homing: Does not incorporate wind drift correction and aircraft follows a curved path to the station

Tracking: Tracking inbound uses a heading to keep the desired track (therefore a straight line). Tracking is used to go direct