EGI

Question 1

What two things make up HNAV

Answer 1

GPS+ INAV

Question 2

Describe INS / What does it provide / What’s a weakness

Answer 2

Passive, worldwide, self contatined // Att, HDG, Postion, Velocity, Accleration / Only accurate for a short period of time.

Question 3

Describe GPS / What does it provide/ What’s a weakness

Answer 3

Passive, worldwide // GPS is worldwide precise and regular position // Not self contained and is vilnerable to jamming and spoofing, no heading and attitude

Question 4

What do P codes give me access to?

Answer 4

Military GPS

Question 5

What is SAASM

Answer 5

Full selective availability/ anti-spoofing

Question 6

GAS-1 stands for what?

Answer 6

GPS antenna System

Question 7

Which EGIs are connected to GAS-1

Answer 7

Both

Question 8

EGI 2 automatically connects to what if GAS-1 Fails / what about EGI 1

Answer 8

SATCOM/GPS

There is no backup

Question 9

What are the four EGI Alignment Types

Answer 9

(1) GPS/INS
(2) Gyrocompass (GC)
(3) Stored Heading (SH)
(4) Directional Gyro (DG)

Question 10

HNAV ( ATT/ HDG Valid / Where/ Align Time )

Answer 10

10 Seconds/ 7 minutes/shore&Shipboard / 15 minutes

Question 11

Directional Gyro ( ATT/ HDG Valid / Where/ Align Time )

Answer 11

10 Secs/ -/Shore&Shipboard/ 2 minutes

It will take like 2 minutes to get off deck

Question 12

Store Heading ( ATT/ HDG Valid / Where/ Align Time )

Answer 12

10 Seconds/ 30 seconds / Shore/ 3 minutes

Question 13

Gyro Compass ( ATT/ HDG Valid / Where/ Align Time )

Answer 13

10 Secs/ 90 Seconds/ shore / 4 mins

Question 14

Which EGIs are required for full AFCS Function

Answer 14

Both

Question 15

EGI #2 provides what for AFCS

Answer 15

Pitch+Roll+ +ATT+ HDG + Vel

Question 16

What does a DG aligment not provide, thus effecting which two functions?

Answer 16

Valid Velocity/ Hover coupler and autp Approach

Question 17

What is a normal Display for FOM

Answer 17

2 or less

Question 18

What is a normal display for EHE

Answer 18

Less than 25 ft

Question 19

What information do the ADCs supply after processing data?

Answer 19

• Barometric altitude and local barometric pressure
• Vertical speed
• Indicated Airspeed (IAS)
• OAT

Question 20

What does the Airspeed Transducer (AST) do?

Answer 20

Receives analog airspeed data from the pitot-static system and retransmits it digitally to the AFCC

Question 21

What configurations can the EGI support?

Answer 21

• Two current legacy EGIs
• A current legacy EGI and a SAASM EGI
• Two SAASM EGIs

Question 22

What are the two navigation modes of the EGI?

Answer 22

• Hybrid navigation (HNAV)
• Inertial navigation (INAV)

Question 23

When is the Gyrocompass (GC) alignment type used?

Answer 23

When the helicopter is not in motion on the ground

Question 24

What does the Directional Gyro (DG) alignment provide?

Answer 24

Attitude and true heading outputs to support a quick launch capability

Question 25

What does the EGI require for coupled approach and hover function?

Answer 25

Valid heading and velocity data from EGI 2

Question 26

What is the purpose of manual entry of latitude and longitude in EGI?

Answer 26

Aids in alignment aboard ship or ashore and satellite acquisition

Question 27

What is required for GPS alignment to begin?

Answer 27

The GPS must acquire and track at least four satellites.

Question 28

What indicates that aircraft heading has become valid after alignment start?

Answer 28

A heading display on the HSI and ‘HDGV-G’ displayed in Display Area 1 of the MD.

Question 29

What is the maximum time for a complete GPS alignment?

Answer 29

15 minutes.

Question 30

What is a Gyro Compass (GC) alignment designed for?

Answer 30

To align an EGI when the aircraft is on the ground.

Question 31

What is required for Stored Heading (SH) alignment to occur?

Answer 31

A GC alignment must be completed prior to the last shutdown.

Question 32

What is the main purpose of a Directional Gyro (DG) alignment?

Answer 32

To provide a quick launch capability.

Question 33

What must be entered by the operator during DG alignment?

Answer 33

Magnetic heading.