Chapter 16, 17, 18 Flashcards
Name the four communications systems backup and failure modes.
- Single mission computer fail
- 1553 data bus failure
- AMC or OCP failure
- Battery mode
Comm Sys Backup and Failure Modes: explain the impact of a single mission computer failure
no impact to ICS or radios
AMC (audio management computer) is operational
Comm Sys Backup and Failure Modes: explain the impact of a 1553 data bus failure
AMC is operating but both mission computers lose power or comm is lost between computers and 1553 data bus
no impact to ICS, radios tuned via RCU, can be selected via OCP or RCU. clear/secure, DF, and RELAY not available on OCP
Comm Sys Backup and Failure Modes: explain the impact of an AMC or OCP failure
RAD 1 hardwired to pilot station
RAD 2 hardwired to copilot station
controlled only via RCU, PTT only
Comm Sys Backup and Failure Modes: explain the impact of the battery mode
only RAD 1 is available and hardwired to the pilot station
controlled via RCU, PTT only
What is INS?
INS is worldwide, passive and self-contained.
Precisely determines: attitude, heading, acceleration, velocity, and position
What is the disadvantage of INS?
information provided is precisely accurate for a short time
What is the disadvantage of GPS?
not self-contained (relies on satellites), vulnerable to jamming and spoofing
What is GPS? What does it provide?
GPS is worldwide and passive.
GPS is employed to provide very precise and regular position, velocity, and time updates to INS to preclude navigation errors.
Define SAASM. What does it provide?
full selective availability / anti-spoofing capability
our EGIs have SAASM have direct Y-code acquisition meaning they can directly tract the encrypted military P(Y) code without first acquiring the civilian code, significantly increasing resistance to jamming
Valid heading and velocity data from which EGI is required for coupled approach and hover function?
EGI 2
How many satellites are required for an HNAV alignment?
4
A normally functioning EGI will display what EHE and FOM?
FOMs of 2 or less and EHE of < 25’
Define RAIM. What does it provide?
receiver autonomous integrity monitoring
compares data from all visible satellites and tags suspect information
EGIs are capable of tracking how many satellites simultaneously?
24
How do you execute a cycloid? How accurate are the results?
a 360 deg. to 390* turn at a steady bank angle and airspeed
expected performance within 2 knots and under 5 deg from actual wind
List the TA array state for each symbol
folded
unfolded
in transition
last known state - folded
last known state - unfolded
last known state - in transition
invalid TA array data
What is a soft INIT?
a soft INIT is defined as initializing a device on the DIAG page by selecting INIT from the pop-up menu
What is a hard INIT?
a hard INIT is defined as initializing a device by pulling the circuit breaker, waiting 20 seconds, resetting the CB, and then performing a soft INIT
