QUIZ 3 AIR NAV - WEEK 10,11

what does NDB stand for?

non-direction

what does ADF stand for?

automatic direction finder

NDB Characteristic?

sends vertically polarized signals in all directions

accuracy of +-5 degrees

What affects ADF

thunderstorms

night effect

station interference

mountain effect

coastal refraction

quadrantal error

dip error

precipitation

NDB Classification

locator beacon

h radio beacon

Locator beacon range and power?

less than 100W, 25-30 NM

H radio beacon

100-3000W, 50NM Or more

what do u need to double range?

quadruple power

ADF Flaw?

no off flag indication

loss of morse code = loss of signal

noo automatic wind correction

MB to beacon formula?

RB + MH (if over 360 subtract 360)

QDR formula?

QDR = QDM (MBTO) +- 180

How to intercept bearing from NDB station?

To station → head +- IA

Fr Station → tail +- IA

VOR Instruments

CDI: course deviator indicator

RMI: radio magnetic indicator

What signals do VORs omit

reference and variable (30 rev/sec)

VHF theoretical range formula?

1.23 (h1^.5 + h2^.5)

VOR Advantages?

extreme accuracy +-1 degree

not affected by static intereference

auto wind correction

VOR disadvantages?

cone of ambiguity

line of sight

reflection of buildings and terrain can cause signals to oscillate