Sonar A-Scope Display; Fuel Display (Fish 4380 Only) - Navman Fish 4350 Installation And Operation Manual

5-4 Sonar A-Scope display

To show the A-Scope display, select Sonar A-
Scope and press . Use this to analyse the sonar
data in detail and optimize the Gain settings.
The user can deÞ ne the level of the weakest
and strongest echoes to be shown on the sonar

5-5 Fuel display (FISH 4380 only)

To show the Fuel display, select Fuel and
press .
(See section 3-3 Setup > Fuel for information
about setting up the fuel values. If the number
of engines is set to 0, the fuel features are
turned off.)
20
displays, by using the Gain setting. See section
4-3 Gain, for more information.
The strength of an echo at a particular depth
is shown by the length of the horizontal line at
Divider line
that depth. A strong echo produces a long line
between
whereas a weak echo produces a short line.
sonar
Fish recognition
history and
The echo strengths shown on the A-Scope can
A-Scope
be useful in recognising the type of Þ sh. Different
Gain setting
species of Þ sh have different sizes and shapes
(strongest
of swim bladders. The air in the swim bladder
echo for
reß ects the ultrasonic pulse, so the strength of
display)
the echo varies between Þ sh species according
to the size and shape of the swim bladder.
When fishing among a school of fish and
Gain threshold
catching them, note the Þ sh species and the
(weakest echo
strength of the echo that it returns on the
for display)
A-Scope. Then, when that particular echo is
seen at future times on the Þ shÞ nder, it is likely
to be the same Þ sh species.
Used shows total fuel used since this was last
reset with the Clear Used command.
R e m a i n i n g shows the amount of fuel
remaining in the tank(s).
Flow shows the fuel consumption per hour.
For twin engine installations, the fuel ß ow for
each engine is shown separately. This is useful
for checking that both engines are under the
same load.
Economy is the distance travelled per unit of
fuel used. The Þ shÞ nder calculates this from
the boat speed and fuel used. The bigger this
number, the better the fuel economy. Adjust
the throttle and trim to achieve the best fuel
economy. Note that the FISH 4380 uses a
paddlewheel transducer to measure speed,
used to calculate the fuel economy. Therefore,
calibration of the boat speed measurement is
essential for an accurate fuel economy reading.
See section 3-8 Setup > Calibrate.
NAVMAN
FISH 4350 / 4380 Installation and Operation Manual