Garmin GPS 400 Pilot's Manual & Reference page 214

SECTION 10
ADDITIONAL FEATURES
To interpret wind speed, add the values of each of the
wind speed barbs. In Figure 10-49, 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 10-49 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
Figure 10-49 Wind Symbol
10-36
Temperature - Dewpoints
The Temperature-Dewpoint Range symbols (Table
10-18) display the difference between the reported
temperature and dewpoint. Differences are shown in
degrees Fahrenheit.
Data Age
This symbol in Figure 10-50 displays the difference
between the reported temperature and dewpoint as 7-10
degrees Fahrenheit at KSPW.
GPS 400 Pilot's Guide and Reference
Temp - Dewpoint Display Ranges
(Blank)
Table 10-18 Temp-Dewpoint Ranges
Temperature Dewpoint
Figure 10-50 Temp-Dewpoint Symbol
Unknown
11°+
(Green)
7° - 10°
(Green)
0° - 6°
(Yellow)
190-00140-60 Rev. H