Chapter 4 Conning Display 4-46
Wind-
force
scale
Name
Equivalent
wind force
Condition on the land Condition on the sea
Shape of
arrow
feathers
*1
10 Storm / Whole
gale
24.5 to
28.3m/s
Rare in inland. Some
trees started to fall
down from the roots.
The wind starts to
cause serious damage
to houses.
Swells leaning over. The
water surface appears to
be white by the white
foams, creating trails of
lines and the visibility
deteriorates due to waves
collapsing violently.
11 Violent storm 28.4 to
32.5m/s
Hardly ever occurs.
The wind causes a
wide range of
damages.
Mountain of swells. The
water surface is entirely
covered by white foams.
Wave crests are blown
away by the wind, creating
spray and the visibility
deteriorates further.
12 Hurricane 32.6m/s or
more
The wind causes more
serious damage.
The atmosphere is filled
with foam and splash and
the water surface became
entirely white. The visibility
deteriorates further.
*1: An arrow feather is displayed in the graphic display (refer to “4.2.3.33 Graphic display of ship's
heading, course over the ground, wind bearing/wind speed, and current information”).
4.2.3.46 Wind speed graph
Item Display contents
Wind speed graph display Displays a wind speed graph.
The unit can be selected on the View menu.
For the details, refer to “5.1.2 Setting up the display of unit of
setting value”.
The range of the graph can be changed on the View menu.
For the details, refer to “5.1.7 Setting wind direction graph/wind
speed graph”.
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