Garmin GPS 500 - Manual (Page 225)

GPS 500 Pilot’s Guide and Reference 12-37
SECTION 12
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 12-16) is the sustained surface wind
speed.
Wind Speed
(Blank) Unknown
Short Barb 5 kts
Long Barb 10 kts
≥ 37 kts
Table 12-16 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 12-17 Gust Offset Graphics
To interpret wind speed, add the values of each of the
wind speed barbs. In Figure 12-48, 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 12-48 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 12-48 Wind Symbol
190-00181-60 Rev. G