Sonar Check - Lighthouse Raymarine gS95 Installation And Operation Instruction Manual

7.5 Sonar check

Sonar transducer and sonar module
selection
You must select the sonar transducer and Sonar
module that you want to use in the displayed
Fishfinder application pane.
Sonar module selection
• Sonar and DownVision
fitted with an internal sonar module.
• All variants allow you to connect a compatible
external sonar module or use an internal sonar
module from a networked display.
• The sonar channel you want to use must be
selected from the Fishfinder menu.
Transducer selection
• Sonar variant displays allow direct connection of a
Raymarine OR a Minn Kota sonar transducer.
• DownVision TM variant displays allow direct
connection of Raymarine DownVision
transducers.
• All variants allow the connection of a Raymarine
sonar transducer via a compatible external sonar
module.
• For all variants use the Transducer Set-Up
menu in the Fishfinder application to specify the
transducer you want to use.
Selecting the sonar channel
To select the channel you want to display follow the
steps below.
From the Fishfinder application:
1. Select Menu.
2. Select Channel.
The Channel selection page is displayed.
3. Select the tab for the sonar module you want to
use.
A list of available channels for the selected sonar
module is displayed.
4. Select a channel from the list.
The Channel selection page will close and the
Fishfinder application will now show the selected
channel.
Selecting the sonar transducer
With the fishfinder application displayed:
1. Select Menu.
2. Select Set-Up.
3. Select Transducer Set-Up.
4. Select Transducer.
A list of transducers is displayed.
5. Select the transducer you want to use.
Selecting the speed transducer
With the fishfinder application displayed:
1. Select Menu.
System checks
TM variant displays are
TM
2. Select Set-Up.
3. Select Transducer Set-Up.
4. Select Speed Transducer.
A list of transducers is displayed.
5. Select your speed transducer from the list.
Checking the sonar
Sonar checks are made using the fishfinder
application.
1. Select a fishfinder page from the Homescreen.
2. Check the fishfinder display.
With the fishfinder active you should see:
• Depth reading (indicates the transducer is
working). The depth is shown in a databox in
the bottom left of the screen.
If the databox is not present it can be turned
on from the Presentation menu: Menu >
Presentation > Databoxes Set-up.
Fishfinder Transducer Calibration
Your fishfinder transducer must be calibrated
correctly to achieve accurate depth readings.
The multifunction display receives the image from
a sonar module which processes sonar signals
from a transducer mounted in the water. If the
transducer is equipped with a speed paddle wheel
and temperature-sensing thermistor, the sonar
module calculates speed and temperature. To
ensure accurate readings, it may be necessary to
calibrate the transducer(s) by applying offsets to
depth, speed and temperature. As these settings
are held in the sonar module and relate to the
transducer, they are applied system-wide.
Depth Offset
Depths are measured from the transducer to the sea
bed, but you can apply an offset value to the depth
data, so that the displayed depth reading represents
the depth to the sea bed from either the keel or the
waterline.
Before attempting to set a waterline or keel
offset, find out the vertical separation between the
transducer and either the waterline or the bottom of
the keel on your vessel, as appropriate. Then set the
appropriate depth offset value.
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