Verifying That The Bottom Is Correctly Detected - Simrad ES80 Reference Manual

Simrad ES80 Reference Manual
Result
The ES80 is now transmitting acoustic pulses ("pinging") into the water.
Further requirements
When the ES80 starts, it is very important that it detects the bottom correctly. In most
cases this will take place automatically. However, we have experienced that large
schools of fish or difficult bottom conditions have deceived the ES80 to display the
wrong depth. In these cases the sounder may display the bottom at 0,0 meters at the top
of the fish school. In order to aid the ES80 to locate the correct depth, you must adjust to
bottom maximum and minimum ranges according to the actual bottom depth.

Verifying that the bottom is correctly detected

Locating the bottom is important for the ES80. The ES80 needs this "bottom lock" to
locate the correct depth, and to stay on it during the operation, even if the depth changes
continuously. Occasionally, difficult environmental, water or bottom conditions may
inhibit "bottom lock".
Context
The
Bottom Detection
depth. These limits may be used to obtain "bottom lock" on the depth when the ES80 is
transmitting. The
Bottom Backstep
the bottom echo the depth shall be detected.
Tip
If you have problems with bottom detection, you may consider disabling it. This can be
useful if you only wish to study targets in the water column.
Procedure
1 Open the
Active
2 Select
Bottom Detection
Tip
The bottom detection parameters are also found as a page in the
dialog box. To open the
Options
button on the
Active
information pane.
36
parameters provide separate limits for minimum and maximum
parameter allows you to manually modify where on
menu.
.
Information Pane Options
menu. To open the page, you can also select
Information Pane
dialog box, select the
in the Depth
Setup
406273/C