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9.7.5 Practical use

Now all 3 legs have been measured (True Track and Distance) and entered into

a table:

Route True Track Mag. track Dist.

EKHG → EKSD 254 252 18

EKSD → EKLV 344 342 25

EKLV → EKHG 128 126 31

The variation is read, in this case, on the map to 2°E (if you use a newer map, the

variation will be higher)

Task: We want to find the WCA for the leg from EKHG→EKSD on our flight.

We want to find GS for the same

We want to find TH for the same

We want to find MH for the same We want to find CH for the same

Solution: Do you remember those classes in school when you had a strange

device in the pencil case? It could spread the legs and you could stick yourself

in at least one of the ends? The compass, and we will use it now! And we will

also use our knowledge of triangles from these classes.

We start by drawing a line

from EKSD and backwards;

just a line that will show

how far we fly in an hour,

because we have our TAS

in KT per hour and also the

wind speed per hour.

Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© 2025 852