Simrad ES80 Reference Manual page 260

Simrad ES80 Reference Manual
A
This is the start depth of the echogram
In a Surface echogram you may wish to start the
echogram from the surface, and will then set the
to 0 (zero). You will then see the
Start Range
transmit pulse as a strong echo at the top of the
echogram. Try setting
value, for example 1 meter. The echogram will
then start immediately under the keel or transducer
face.
B
This is the bottom (seabed)
The bottom is shown with a strong contour. Since
the echogram is referenced to the sea surface, the
bottom will vary with the actual depth. Different
bottom conditions will have a visual effect on how
the bottom echo is drawn. A hard bottom (rock)
will give you a stronger echo - and thus a darker
colour - than a soft bottom (mud or silt).
The page in the
Echogram
allows you to make adjustments to the bottom contour. You can add a black bottom
line, and a white line to make the bottom "stand out". You can use the hardness
line to indicate how hard the bottom is.
C
Transducer identification
This text identifies the transducer - and thus also the channel - used to create the
echogram. In this context, the phrase channel is used as a common term to identify
the combination of transceiver, transducer and operating frequency.
D
This is the scope view
The Scope view is used to indicate how strong each echo is. The colour and the
length of each line reflects the received echo amplitude.
E
These are the labels
Small labels are shown in the bottom left and right corners of the echogram. These
labels can contain time or distance to identify the horizontal axis of the echogram.
You can hide the labels from view.
• : The labels are hidden
None
• : The horizontal scale is set automatically
Auto
• : The horizontal scale is defined by time. The time shown in the bottom
Time
right corner of the echogram is then the current time (now).
• : The horizontal scale is defined by distance. The distance shown in the
Distance
bottom right corner of the echogram is then 0 nautical miles (starting point).
The label information can be changed using the
page in the
Axis
258
to a small
Start Range
Echogram
dialog box.
Echogram
dialog box
options on the
Label Horizontal
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