Nav func

Question 1

VOR and LOC freqs

Answer 1

108.00-117.95 VOR freqs

LOC is 108.10-111.95

Question 2

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

Answer 2

NAV RADIOS page on the CDU

Question 3

What do the angular accelerometers measure?

Answer 3

(Pitch, Roll, Yaw)

How A/C is twisting in space

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

108.00-117.95 MHz

Question 6

How many channels does the ARN-153 TACAN have?

Answer 6

252 (126 Y and 126 X)

Question 7

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

Answer 7

OVLY 1 page

Question 8

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

Answer 8

Selective Availability/ Anti Spoofing,

Prevent jamming, only allows use by systems with selected codes (y codes)

Question 9

How would you select the SA/AS codes for use on GPS 1?

Answer 9

Change constellation type on GPS page of INAV page(to y only)

All y codes

Question 10

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

Answer 10

Bottom of helicopter at STA 100 R Butt line 31

Question 11

Where is the ARN-149 ADF antenna located?

Answer 11

Bottom centerline of helicopter (STA 190) jut forward of Marker beacon antenna

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, Universal Time Coordinated (UTC) (Zulu) synchronized time

PVTU

(internal battery to retain GPS Selective availability/ Anti-spoofing codes and almanac)

Question 14

How many linear accelerometers and angular accelerometers does each Inertial Navigation System contain?

Answer 14

3 and 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

How many navigation solutions are provided by each EGI?

Answer 16

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

6 total

Question 17

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

Answer 17

Normally X are ground stations and Y are airborne stations

Question 18

What information does the TACAN radio provide?

Answer 18

Accurate bearing, slant range, Identification information,

Accurate bearing, slant range, Identification information, Course deviation, To-From

Question 19

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

Answer 19

390 Nm

Question 20

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

Answer 20

200 NM

Question 21

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

Answer 21

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