IGI

Question 1

Which output from the Integrated GPS INS (IGI) is the major source of navigation data?

Answer 1

Blended Global Positioning System (GPS) and inertial navigation function

Question 2

How does the Integrated GPS INS (IGI) achieve its blended navigation solution?

Answer 2

Via the use of an algorithm known as a Kalman filter

Question 3

What is the purpose of the battery located in the Integrated GPS INS (IGI) unit?

Answer 3

To maintain Lower Power Time Source (LPTS), retain crypto variables, provide cold load of crypto variables, perform the cold zeroise function and hold up almanac

Question 4

How long will the Integrated GPS INS (IGI) unit continue to operate before it performs a controlled system shutdown after primary power is lost ?

Answer 4

30 minutes

Question 5

Why does the Controlled Reception Pattern Antenna (CRPA) consist of four switchable antennas?

Answer 5

To improve reception, prevent jamming and provide redundancy

Question 6

What is the main purpose of the Digital Antenna Control Unit (DACU)?

Answer 6

To control Controlled Reception Pattern Antenna (CRPA) switching, if jamming signals are detected

Question 7

What output from the Integrated GPS INS (IGI) unit is sent to the Emergency Control Panel (ECP)?

Answer 7

Precise Time and Time Interval (PTTI)

Question 8

How accurate will the position data be if the Global Positioning System (GPS) obtains a Figure of Merit (FOM) 1?

Answer 8

Within 25 m

Question 9

Where is the Integrated GPS INS (IGI) switch located?

Answer 9

On the overhead panel

Question 10

What systems must be selected on prior to applying power to the Integrated GPS INS (IGI)?

Answer 10

Avionics Management System (AMS), Tactical Processor (TP)

Question 11

What is the aim of the Global Positioning System (GPS) only start-up initialisation?

Answer 11

To achieve a GPS Figure of Merit (FOM) of 1

Question 12

What system drives the hover display indicator?

Answer 12

Integrated GPS INS (IGI)

Question 13

How is a IGI data failure displayed on the hover display?

Answer 13

White boxed red FAIL in centre, red letter F in place of the GS readout

Question 14

What issue may cause the Global Positioning System (GPS) to take 15-20 minutes to initialise?

Answer 14

The almanac is out of date

Question 15

What is the default and fastest alignment mode associated with the embedded Inertial Navigation System (INS)?

Answer 15

GCAlign mode

Question 16

What type of alignment action will be performed during an Integrated GPS INS (IGI) initialisation process when a “SEA” option is selected?

Answer 16

On Deck Alignment (ODAlign)