display
a fish
arch, it has to
be able to receive the fish's echo from the
time it enters the cone until.
it leaves. If the sensitivity is not high
enough, the unit displays the fish only when it is in the center of the
cone.
3. Use the Zoom feature. It is much easier to
display
fish arches when
zoomed in on a small range
of water than a large one. For example,
you will have much better luck seeing
fish arches with a 30 to 60 foot
range than a 0 to 60
foot range. This
enlarges
the
targets, allowing the
display
to show much more detail.
4. The boat must be moving at a slow
trolling speed
to see fish arches.
If the boat is motionless, fish stay in the
cone,
showing
on the
display
as
straight
horizontal lines.
ELECTRICAL NOISE
A major cause of sonar problems is electrical noise. This usually
appears
on the sonar's
display
as random
patterns of dots or lines. In
severe cases, it can completely cover the screen with black dots, or
cause the unit operate erratically, or not at all.
To eliminate or minimize the effects of electrical noise, first try to
determine the cause. With the boat at rest in the
water,
the first thing
you should do is turn all electrical equipment on the boat off. Make
certain the
engine is off, also. Turn your Z-9500
on, then turn off ASP
(Advanced Signal Processing). There should be a steady bottom
signal on the
display. Now tum on each piece
of electrical equipment
on the boat and view the effect on the sonar's display. For example,
turn on the
bilge pump
and view the sonar
display
for noise. If no noise
is present, turn the
pump off, then turn on the VHF radio and transmit.
Keep doing
this until all electrical equipment has been turned
on, their
effect on the sonar
display noted,
then turned off.
If you find noise interference from an electrical instrument, trolling
motor, pump,
or radio, try
to isolate the
problem. You can usually
re-
route the sonar unit's
power
cable and transducer cable away from the
wiring that is causing
the interference. VHF radio antenna cables
radiate noise when
transmitting, so be certain to
keep
the sonar's wires
away from it. You may need to route the sonar unit's power cable
directly
to the
battery
to isolate it from other
wiring
on the boat.
If no noise
displays on the sonar unit from electrical equipment, then
make certain everything except the sonar unit is turned
off, then start
the engine. Increase the RPM with the gearshift
in neutral. If noise
ROUTES
The Z-9500
gives you the ability
to go to several
waypoints
in a row.
This feature is called Routes. A route
consists of two or more way-
points. When you run a route, the Z-9500
gives you navigation informa-
tion to the first waypoint in the route. As you reach the first waypoint,
the arrival alarm sounds, then the next waypoint is automatically se-
lected
by the unit. Navigation information is displayed
for this
waypoint
until the arrival alarm sounds and the process repeats for the next
waypoint. This
happens
until you've
travelled to all the
waypoints
in the
route.
There are two steps necessary to create a route. First you must name
the route. Then pick the
waypoints to use in the route. To follow a
route, you simply determine the starting waypoint,
then decide whether
to follow the route forward or backward. After these steps are com-
pleted, the Z-9500 will start navigating on the route.
Creating
a Route
To create a route, first press the MENU key .Now press the key adja-
cent to the "More" label. Now
press the
key next to the "Route Plan-
ning" label. The screen shown below appears. Next, press the key
adjacent
to the
"Create
New
Route" label. The screen shown at the
top
of the next
page appears.
Select Function
'Create New Itoute
Erase Route
r. Follow Route
' Cance 1 Route
a I
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