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Flashcards in Visual Navigation Deck (14):
1

Good indicator of flight progress

Measuring time

Tell us where and when to look on the map

2

Low alt VRP

Need to have features with high vertical extent, unique and big

Doesn’t give accurate position fix but are easy to see

3

Higher alt VRP

Features with great horizontal extent
E.g, lakes, motorways, railways

Difficult to spot but gives an accurate position fix

4

If you miss your checkpoint

Continue to fly the planned HDG and speed to next checkpoint

If can’t spot the checkpoint at the end of the current leg, continue till eta and then set planned HDG for the next leg

5

If you miss multiple checkpoints

Your actual position is likely to be progressively further from the actual position

Depending on your proximity to controlled or restricted airspace will determine if this counts as an emergency

Look for a line feature

6

Examples of line features

Rivers
Coasts
Canyons
Ridges
Man made things such as roads/ railways

7

Line feature perpendicular to the track is good for?

Checking time and ETA

8

2 line features are good for

Checking GS if they are perpendicular

9

A crossing point of line features are good for

A position fix

10

Single line feature parallel to the track is good for?

Good for checking drift and tracking

11

White out

Caused by snow cover and cloud cover - similar colours so they can block out the horizon

12

The effect of time of day on visual nav

Engle of the sun can effect shadows and reflections

Reflections and shadows can make features look more distinctive

13

1 in 60 equation

Track error = (dist off x 60)/dist gone

14

G/s and Rod equations

Ht on g/s = angle x 100 x range

Rod = angle x 100 x (GS/60)