Navigation

Question 1

Navigation subsystem consists of 10 things

Answer 1

2 EGI's
2 Air data computers ADC
1 air data transducer
1 air speed transducer
Tacan set
Direction finding group
Radalt
AFCS with digital Advanceed flight control computer AFCC
Data transfer interface unit DTIU
GPS Antenna System (GAS-1)

Question 2

Navigation 6 functions

Answer 2

Navigation using ship and helo systems

Position keeping, using GPS coordinates

Position correction, used to correct errors due to helicopter navigation drift and buoy drift

Processing for FTP positions and generated flight path

Navigational inputs for sensor processing and display

Waypoints and flight plans to assist in helicopter navigation

Question 3

INS

Answer 3

worldwide, passive, and self contained

determines aircraft attitude, heading, acceleration, velocity, and position

Question 4

EGI Alignment types

Answer 4

GPS/HNAV
In flight (IF)
Gyro Compass (GC)
Stored Heading (SH)
Directional Gyro (DG)
Data Link (DL)

Question 5

HNAV occurs when

Answer 5

Default power on, can be commanded by pilot if LAT/LONG 0/0

Question 6

Time for attitude verified

Answer 6

10 seconds

Question 7

In flight (HNAV) occurs when

Answer 7

automatic with Weight off wheels; pilot initiated in flight

Question 8

Directional Gyro occurs when

Answer 8

Pilot initiated, used for quick launch

Question 9

Gyro compass occurs when

Answer 9

Pilot initiated quick ground alignment

Question 10

Stored Heading occurs when

Answer 10

Quick ground alignment requires completion of a GC alignment, orderly shutdown and parking brake set

Question 11

Data link alignment occurs when

Answer 11

Pilot initiated

Question 12

Max Time for full alignment HNAV

Answer 12

15 minutes

Question 13

Max Time for full alignment DG

Answer 13

2 minutes

Question 14

Max Time for full alignment GC

Answer 14

4 minutes

Question 15

Max Time for full alignment Stored heading

Answer 15

3 minutes

Question 16

Max Time for full alignment Data link

Answer 16

10 minutes

Question 17

What EGI mode do you need to take off

Answer 17

Heading verified HDGV-(G, GC, SH, DL)

Question 18

FOM

Answer 18

1 best position error less than 25 meters

9 worst Position error greater than 5000 meters

Question 19

What will you lose if EGI 2 goes down (no valid heading and velocity data)

Answer 19

Coupled approach and hover functionality

Question 20

Alignment type that can’t give Valid heading

Answer 20

Directional Gyro

Question 21

Valid heading for shore ops vs. ship ops

Answer 21

Shore - GPS, IF, GC, DL, SH

Ship - only GPS

Question 22

Air to air tacan difference in channels

Answer 22

63 apart

Question 23

Antenna that both EGI’s are connected to

EGI#2 also connected to?

Answer 23

GPS antenna system (GAS-1)

SATCOM/GPS

Question 24

SAASM

Answer 24

Selective availability/anti-spoofing module