Simrad ES80 Reference Manual page 263

A
This is the start depth of the echogram
In a Bottom echogram you will probably wish to
start the echogram from a fixed distance above the
bottom. To do this, you must set the
to a negative value, for example -10 m. This
negative value defines how many meters above
the bottom the echogram will start.
The value defines the vertical "height" of
Range
the echogram. To make sense, the value must be
positive, and numerically larger than the chosen
. If you have chosen to start your
Start Range
echogram from -10 m, the range must be larger
than 10 meters, for example 20 meters.
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
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).
406273/C
Start Range
dialog box allows you to make adjustments to
Echogram
User interface
261