Si-text trawl plot 12, User Manual, Page: 94 / 118

96 User Manual
Fig. A - Preview of the area covered by the requested weather forecast
The coverage of the weather forecast in each instant is determined by the maxi-
mum speed of the boat given at the time of subscription (see Fig. A and table Aa below).
COVERAGE OF THE FORECASTING AREA
Maximum Speed(Knt) Width in Degree Travel Distance (Nm)
5 160 30
10 150 60
15 140 90
20 130 120
25 120 150
30 110 180
35 100 210
40 90 240
Fig. Aa - Table of the area covered by the forecast
A.1 PRESENTATION OF DATA
The information received from the weather data server consists of two type
of information which will be shown on the plotter screen, represented by two differ-
ent icons, one relating to wind and the other to waves.
The icon for wind is a circle with an arrow pointing towards the center where
the arrow represents the direction of the wind, it will show a number this represents
speed (shown in units according to measurements pre-set by the user - see the left
column in Fig. A.1). It is possible to pre-set an upper limit for the wind speed and
connect this limit to an alarm which will alert and request navigator action (see the
right column in Fig. A.1).