B&G Zeus2 12 - Manual (Page 89)

Weather
The Zeus 2 includes weather functionality that allows the user to view forecast data overlaid
on the chart. This helps gaining a clear understanding of the weather conditions that are
likely to appear.
Zeus
2 supports weater data in GRIB format, available for download from various weather
service suppliers. The system also supports weather data from SIRIUS Marine Weather Service.
This service is available only in North America.
Wind barbs
The rotation of the wind barbs indicate the relative wind direction, with the tail showing the
direction the wind is coming from. In the graphics below the wind comes f rom from
northwest.
Wind speed is indicated by a combination of small and large barbs at the end of the wind
tail.
Zero knots / Indeterminate wind direction
Small barb = 5 knots
Large barb = 10 knots
Arrow barb = 50 knots
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 shows 3 x large barb + 1 x
small barb = 35 knots, and 60 knots indicated with 1 x arrow barb + 1 x large barb.
Wind speed: 35 knots Wind speed: 60 knots
GRIB weather
A GRIB file contains forecast information for a set number of days. It is possible to animate the
weather data which shows how weather systems are developing.
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Weather | Zeus2 Operator Manual 89