B&G Zeus 12 - Manual (Page 75)

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Weather 15.
GRIB Weather
GRIB is the format used by the meteorological institutes of the world to transport and
manipulate weather data. You can import GRIB files via a memory card or USB key onto
the Zeus unit and overlay the information onto your charts.
GRIB Symbols explained
Zero knots / Indeterminate wind direction
Wind direction Small Barb value = 5 knots
Wind Direction Large Barb value = 10 knots
Wind direction Arrow Barb value = 50 knots
Wind Direction 2 x Large Barbs 1 x Small Barb = 25 knots
The wind tail indicates the relative wind direction from 0 to 359º. Wind speed is indicated
by a combination of small and large barbs at the end of the wind tail. If a combination
of 5 and 10 knot barbs are shown on a tail then these will need to be added together to
give you the total wind speed. The example below left shows 3 x large barb + 1 x small
barb = 35 knots. Below right shows 60 knots in a different direction, 1 x 50kn arrow + 1
x Large barb.
Direction
Large Barbs
Small Barb
Large Barb
50kn Arrow
Loading a GRIB File to Zeus Memory
Note: Zeus does not come pre loaded with any GRIB files.
To load a GRIB file onto your Zeus unit, insert a USB stick or Memory card that contains
a GRIB file into the USB/Card port on the front of the Zeus unit. To view the contents go
to Files menu.
Ensure ‘Memory Card - USB Front’ is highlighted and press the right arrow key to enter.
Use the arrow keys to highlight the required GRIB file.
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