GNS 530(A) Pilot’s Guide and Reference
190-00181-00 Rev. H
14-37
SECTION 14
ADDITIONAL FEATURES
Winds
Wind Vector - The wind vector indicates the
direction of the surface wind to the nearest 30˚
increment (e.g. 30˚, 60˚, 90˚, 120˚, etc.).
Wind Speed - In general, the sum of the wind barbs
(see Table 14-16) is the sustained surface wind
speed.
Wind Speed
(Blank)
Unknown
Short Barb
5 kts
Long Barb
10 kts
≥
37 kts
Table 14-16 Wind Speed Graphics
Gust Offset
(Blank)
Gusts are unknown or < 5 kts above
sustained wind speed.
G10
(Green)
Wind is gusting 5 - 10 kts more than
sustained speed.
G11+
(Yellow)
Wind is gusting 11 kts or more above its
sustained speed.
Table 14-17 Gust Offset Graphics
To interpret wind speed, add the values of each of the
wind speed barbs. In Figure 14-48, there are two long
barbs (10 knots each) and one short barb (5 knots each).
Thus, the total wind speed is 25 knots. Adding the gust
offset to this figure gives winds gusting to 36 knots. Thus,
the symbol in Figure 14-48 indicates the surface wind at
KFRM is coming from a direction of 300° at a speed of
25 knots, gusting to 36 knots or greater. The data age is
11-20 minutes old.
Gust Offset
Wind Speed
Wind Vector
Data Age
Figure 14-48 Wind Symbol
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