SYS 205/206 - Nav Systems and GPS Flashcards
What processes the VOR/ILS signals received by the antennas located on the vertical fin and bottom of fuselage?
Remotely mounted nav receiver in the right avionics bay
VOR stations transmit azimuth signals through 360° in 1° increments called what and referenced to where?
Radials; magnetic north
What does a VORTAC provide?
VOR radial, TACAN radial (not able to be displayed on T-6A), TACAN distance (DME)
VOR signals are subject to what restrictions?
Line-of-sight 🡪 altitude, terrain
What does a freq pairing scheme mean for VOR/DME or VORTAC?
Turning the VOR freq automatically tunes the DME receiver to the paired DME /TACAN freq to receive distance information
Where on the T-6A does the VOR detect radial signals?
Combination NAV/GS/ILS antennas mounted on each side of the vertical stabilizer
The ILS system is composed of what 3 distinct signals
Localizer: 108.10 – 111.95 MHz
GS: 329.15 – 335.00 MHz
Marker beacons: 75 MHz
Where is the marker beacon located, and what processes the marker beacon signals?
Antenna = bottom of fuselage just in front of the vertical fin; processed by nav receiver in the right avionics bay
When does the EHSI switch to LOC?
When localizer freq is made primary on RMU
How does the EADI change when localizer freq is made to primary RMU?
GS/localizer scale/deviation; marker beacon
DME measures what?
Slant range from station to aircraft
Where is the DME antenna & receiver?
Bottom of the aircraft in front of marker beacon; right avionics bay
What does DME HOLD do?
“Hold” DME freq w/ currently selected primary station 🡪 new freq becomes primary guidance, old gives DME
TAS tracks aircraft w/in what ranges?
40 NM radius, 10,000 ft above/below the aircraft
What are the TAS limits for NORM?
±2700 ft
