Direction Finder Flashcards
(12 cards)
How many guard receivers are there in the Direction Finder (DF)?
Five
What is the COSPAS-SARSAT guard frequency?
406.025 MHz
Which satellite system covers the polar regions for Search and Rescue (SAR)?
LEOSAR
Which satellite system provides almost immediate alerting of beacon position?
GEOSAR
Where is the Direction Finder (DF) receiver located?
On the underside of the aircraft along the aircraft centre line, just forward of the Semiautomatic Cargo Release Unit (SACRU) mounting bracket
Which power supplies the Direction Finder (DF) ?
28 Vdc from the general services bus
Within the Direction Finder (DF) system, what is the purpose of the Clear Signal Conversion Interface Unit (CSCIU)?
To prevent the DF receiver from displaying transmissions from your own aircraft
What is the “*Target” selection on the DF Page 2/2 for?
Enables the On Top Position Indicator (OTPI) information to be used as the data source for both the Mark and Fix pages in the NAV page structure
What information does the On Top Position Indicator (OTPI) give to the crew?
When the aircraft is directly over the beacon
What is the maximum number of 121.5 MHz beacons that can be displayed by the system on the Control, Display and Navigation Unit (CDNU)?
Three
What Built-In-Test (BIT) facilities for the Direction Finder (DF) are available when the aircraft is in flight?
It is disabled
What is the purpose of the Direction Finder (DF) lock function?
Inhibits the DF receivers to protect against its own aircraft radio transmissions
