GPS APPROACHES Flashcards Preview

Instrument Study Supplement > GPS APPROACHES > Flashcards

Flashcards in GPS APPROACHES Deck (10):
1

WAAS

WIDE AREA AUGMENTATION SYSTEM
USES GROUND BASED NAVIGATION ALONG WITH SATELLITES TO IMPROVE ACCURACY, INTEGRITY, AND AVAILABILITY
RELIES ON DEVIATION CORRECTION (DC) TO MAINTAIN ACCURACY

2

LPV APPROACHES

LOCALIZER PERFORMANCE WITH VERTICAL GUIDANCE
SIMILAR TO CAT I ILS USING WAAS
FLIES LIKE ILS TO A DA
PROVIDES STABLE VERTICAL GUIDANCE
ANGULAR GUIDANCE WITH INCREASING SENSITIVITY
AS LOW AS 200 FEET MINIMUMS

3

LNAV/VNAV

LATERAL NAVIGATION/VERTICAL NAVIGATION
VNAV USES INTERNALLY GENERATED GLIDE SLOPE USING WAAS
MINIMUMS USE A DA
IF BARO-VNAV INSTEAD OF WAAS MAY EFFECT APPROACH BASED ON TEMPERATURE

4

RAIM

RECEIVER AUTONOMOUS INTEGRITY MONITORING
SELF TEST TO ENSURE PROPER GPS FUNCTION
REQUIRES AT LEAST 5 SATELLITES TO ENSURE COVERAGE IS NEVER LOST IN THE EVENT 1 BECOMES UNRELIABLE
RAIM PREDICITION OCCURS 2NM PRIOR TO FAF CONFIRMS RAIM AVAILABILITY BY HIGHLIGHTING 'APR' GREEN

5

RNAV/GPS APPROACHES

RAIM IS REQUIRED
SYSTEM OF 24 SATELLITES
5 REQUIRED FOR RAIM 4 REQUIRED FOR 3D POSITION

6

ENR MODE

ENROUTE MODE
OUTSIDE 30NM
CDI 5.0NM FULL SCALE DEFLECTION

7

TERM MODE

TERMINAL MODE
WITHIN 30NM
CDI 1.0 NM FULL SCLAE DEFLECTION

8

APR MODE

APPROACH MODE
2NM FROM THE FAF
CDI .3 NM FULL SCALE DEFLECTION

9

RNAV/WAAS LP APPROACH

LOCALIZER PERFORMANCE WITHOUT VERTICAL GUIDANCE
USED IN AREAS WHERE TERRAIN OR OBSTRUCTION DON'T ALLOW VERTICALLY GUIDED LPV
LP IS NOT FAIL DOWN MODE FOR LPV THEY ARE SEPARATE
MINIMUMS NOT PUBLISHED WITH LINES OF MINIMA
USUALLY LOWER THAN LNAV
USES A MDA

10

RNAV/WASS LNAV APPROACHES

NON PRECISION PROVIDE LATERAL GUIDANCE
MUST CHECK RAIM WHEN NOT USING WAAS
USES MDA