Table of Contents
Advertisement
To show or hide the A-scope display, swipe the bottom of the screen upwards to show
the layered menu, then tap the toggle box at [A-Scope]. Select [ON] to show the A-
Scope, or [OFF] to hide the A-Scope.
A-Scope peak hold
You can show the "normal" A-scope display plus the peak-hold amplitude picture for
the last five seconds in dots. To show the peak hold display, turn on [A-Scope Peak
Hold] in the [Settings] => [Fish Finder] menu.
8.4.3
Bottom discrimination display
The bottom discrimination display analyzes the seabed echo to categorize seabed
hardness in one of four types (rocks, gravel, sand, mud) and shows the results in a
colorful graphic display. A transducer that supports bottom discrimination is required.
Graphic: The most probable material on the seabed
(mud, sand, gravel, rock) is indicated graphically.
Composition legend
Sand
Rock
*: The probability bar indicates
the degree of trust for the
seabed composition estimate.
(Green=Normal; Yellow=Caution;
Background color=Abnormal)
See the installation manual for a full list of transducers which can be connected to your
SMD7/9. CHIRP transducers are NOT compatible with the Bottom Discrimination fea-
ture.
There are two bottom discrimination displays: graphic and probability.
Single frequency display
Probability
Gravel
bar*
Mud
Weak reflection
(small fish or noise)
Fish echo
Strong
reflection
(bottom)
A-scope display
Probability: The most probaility of each seabed
material is indicated in graph form.
Composition legend
Sand
Rock
Graph example
Graph example
Mud probability
(Approx. 25%)
Sand probability
(Approx. 25%)
Rock probability
(Approx. 50%)
8. FISH FINDER
Gravel
Mud
8-3
Advertisement
Table of Contents
