Navigation

Question 1

Radio navigation. The airplane is equipped with?

Answer 1

1. Two navigation receivers
2. Two DME receivers
3. Marker beacon(MB)

Question 2

How many IRUs are in the airplane, and where are they located?

Answer 2

Three and located under the left and right console.

Question 3

Explain the IRUs

Answer 3

Each IRU contains accelerometers and laser gyros to measure inertial motion. They receive initialization data from GNSS, and altitude and airspeed from air data systems probes.

Question 4

IRUs provide information to what systems?

Answer 4

IRUs provide display units and various aircraft systems with aircraft attitude, heading, wind speed and direction, and flight path.

Question 5

When does the IRUs execute an automatic alignment process?

Answer 5

At start-up

Question 6

True or False

With regards to IRU positioning, manually entered position does not have priority over any GNSS position?

Answer 6

False.

Manually entered position have priority.

Question 7

What are the different alignment time variations?

Answer 7

Varies with Latitude:

1. 5 mins @ 0 degree latitude;
2. 10 mins between 60 and 70 degrees of latitude;
3. 17 mins above 70 degrees of latitude.

Question 8

What does GNSS stand for and purpose?

Answer 8

Global Navigation Satellite System: provides aircraft position, speed, and time data to the FMS, IRS, terrain awareness system(TAWS), and surface management system.