Operation Manual

Simrad PI54
198
850-165186 / Rev.B
Delay: For each sensor marker, you can define a presentation
delay. The echogram information provided by the PI54 is from
directly below the hull, but the marker information come from
the sensors, which are positioned some distance away. You can
therefore calculate a delay (in minutes and seconds) manually
based on the wire length, towing depth and speed, and with this
delay place the marker at its correct location on the echogram.
You can also enable the Trawl calculator function, and have the
delay calculated automatically.
Width: For each sensor marker, you can define the width of the
marker line in pixels. T he colour of the line will automatically
be set to the current background colour of the numeric
presentation of the sensor data. The default line width is 2
pixels.
Show: Switch the marker(s) on or off to suit your preferences
and need for information. Use the palette to define unique
colours in order to distingush the markers from each other.
Surface temperature: This parameter allows you to
superimpose a temperature curve on the graphic display. To read
the values, you need to enable the temperature scale in the
Graphic setup. You can change the width of the temperature
marker line, and choose a colour from the palette.
Sensor marker in expansion: With this setting active, the
Depth and Height marker lines are expanded, and thus easier to
read. This is a useful feature when the sensor is towed close to
the bottom, and it is particulary important for the Height sensor.
Marker white zone: When enabled, white pixels are added
above and under the marker to make it easier to distinguish it
from the background colours.
Height marker in main echogram: If you have a Height
sensor on the top of a bottom trawl and t he trawl opening is
small, it may be difficult to tell the Height marker from the
bottom echo. If this is the case, set this function to Off,and
view the Height marker in expanded mode only.