Navigation Functions

Question 1

The ARN-149 ADF radio is controlled by what means?

Answer 1

NAV RADIOS page on the CDU

Question 2

What do the angular accelerometers measure?

Answer 2

How aircraft is twisting in space (Yaw, Pitch, Roll)

Question 3

Where is the ARN-153 TACAN R/T located?

Answer 3

Under companionway floor next to CVDR (STA 100)

Question 4

How many antennas are associated with ARN-147 VOR/ILS/MB system?

Answer 4

3 (VOR/ILS,GS,MB)

Question 5

Over what frequency range does the VOR/Localizer receiver receive and process signals?

Answer 5

108-117.95 MHz

Question 6

How many channels does the ARN-153 TACAN have?

Answer 6

252 (126 X and 126 Y)

Question 7

Which MFD display page is the navigation bearing pointers and course deviation indicator selected?

Answer 7

OVERLAY 1 page

Question 8

What are SA/AS codes? (Explain the acronym and their function)

Answer 8

Selective Availability / Anti-Spoofing. Prevents jamming, only allows use by personnel with selected codes.

Question 9

How would you select the SA/AS codes for use on the GPS1?

Answer 9

Change constellation type on GPS page from INAV page

Question 10

Where is the ARN-153 TACAN R/T antenna located?

Answer 10

Bottom of the helicopter

Question 11

Where is the ARN-149 ADF antenna located?

Answer 11

Bottom of the helicopter

Question 12

Where are the EGIs located?

Answer 12

Bottom of the avionics closet

Question 13

What information is provided by the EGIs?

Answer 13

Position, Vertical Speed, Time Tags, UTC time

Question 14

Each Inertial Navigation System contains ____ linear accelerometers and ____ angular accelerometers to calculate aircraft position and attitude.

Answer 14

3,3

Question 15

How many navigation solutions are provided by each EGI?

Answer 15

3 by each (INS Only, GPS Only, Blended GPS/INS)

Question 16

What’s the difference between TACAN X Channels and TACAN Y Channels?

Answer 16

Normally X are ground stations and Y are airborne stations

Question 17

What information does the TACAN radio provide?

Answer 17

Bearing, Slant Range, Identification

Question 18

What is the operating range to an air-to-ground TACAN station for the TACAN radio?

Answer 18

390 Nm

Question 19

What is the operating range to an (air-to-air) TACAN station for the TACAN radio?

Answer 19

200 Nm

Question 20

What is an advantage of using a Ring Laser Gyro for the INU system?

Answer 20

No moving parts, little inherent drift, compact/lightweight, virtually indestructible

Question 21

To calculate aircraft position and attitude, each Internal Navigation System contains three linear accelerometers and three ____ accelerometers.

Answer 21

Angular

Question 22

F models will give ____ information when paired together

Answer 22

Distance