Furuno FCV-588, Operator'S Manual

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2. SYSTEM MENU
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2.5 Units Menu
[ Depth ]: Select unit of depth measurement,
among [m], [ft], [fm], [HR] (Hiro, Japanese)
and [pb].
[ Temp ]: Select unit of water temperature
measurement, between °C and °F. Water
temperature data is required.
[ Fish Size ]: Select unit of fish size measure-
ment, between [inch] and [cm].
[ Speed ]: Select unit of speed measurement
among [kn], [km/h] and [mph]. Speed data is
required.
[ Wind ]: Select unit of wind speed measure-
ment, among [kn], [km/h], [mph] and [m/s].
Wind speed data is required.
[ Distance ]: Select unit of distance measure-
ment, among [NM], [km] and [SM].
2.6 Calib Menu
[ Draft ]: The default depth
display shows the distance
from the transducer. If you
would rather show the dis-
tance from the sea surface,
set your ship's draft.
[ Gain ADJ HF ], [ Gain ADJ
LF ]: If the gain is too high or
too low, or the gain for the
low and high frequencies
appears unbalanced, you
can compensate it here.
[ Temp ]: If the water tem-
perature indication is wrong,
you can correct it here. For
example, if the water tem-
perature indication is 2°
higher than actual water temperature,
enter -2.
[ Speed(STW) ]: If the speed
indication is wrong, you can
correct it here. For example,
if the speed indication is
10% lower than actual
speed, enter +10.
[ Fish Size ]: Compensate for wrongful indica-
tion of fish size.
[ Water Type ]: Select the water type with
which to use the equipment, from [Salt] or
[Fresh]. Select correct water type to get accu-
rate depth data.
[ Zero Line Rejector ]: Turn the zero line
(transmission line) on or off. When turned on,
the transmission line disappears, which al-
lows you to see fish echoes near the surface
clearly. The length of the transmission line
changes with transducer used and installation
characteristics. If the width of the transmis-
sion line is 4.5 ft (default value) or more, set
the transmission line width with [Zero Line Ar-
ea], as below.
Setting value Compensation size
+100% Double
+50% 1.5
-50% 1/2
-65% 1/3
-75% 1/4
-80% 1/5