Instruments 1 Flashcards
The three main navigation systems used by army aviators are?
VOR
NDB
GPS
The signals from a VOR ground station provides 360 usable courses known as
Radials
Which NAVAID is affected by atmospheric static interference?
NDB
Which NAVAID’s range is limited by line-of-sight?
VOR
Which NAVAID transmits on VHF?
VOR
What is the only positive method of indent. of the VOR?
Morse code identification
What is the accuracy of the VOR ground transmitter?
±1 degrees
What name is used for airways formed with radials from VORs?
Victor Airways
What are the three classes of VOR?
T - Terminal
L - Low Altitude
H - High Altitude
What is the normal range (SSV) of an L or HA class VOR at 1000 feet AGL?
40 NM
What are the four classes of NDBs?
Compass locator
MH
H
HH
Service volume of a Compass Locator NDB?
15 NM
Service volume of a class MH NDB?
25 NM
Service volume of a class H NDB?
50 NM
Service volume of a class HH NDB?
75 NM
What are some of the information that GPS provides to the heli pilot?
a. Position
b. GS
c. course guidance
d. distance
e. time to waypoint
What types off approaches exist?
- Precision (PA)
- Non-precision (NPA)
- App. with vertical guidance (APV)
An approach with course and glidepath deviation information is a?
Precision app (PA)
An approach with course deviation information, without glidepath is a?
Non-precision app (NPA)
