On the Water

Understanding the Chart

Remember that the Fishfinder displays a 2D picture of the underwater environment. The fish and tree could be located anywhere in the coverage area produced by the sonar cone at the object’s indicated depth.

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Understanding the Chart

It is important to understand that the unit does not display a 3-D representation of the underwater environment. The unit can display multiple things at the same time, but cannot determine from where the return originated. It can only determine when the return was received.

Examples 1and 2 provides a look at the underwater world from a top view, and illustrate how these views would be displayed on the chart. On both charts it appears the fish and tree are side by side as shown in Example

1.However, when we look at Example 2., we see that the fish can be several feet from the tree. It is important to remember that the Fishfinder cannot determine where in the coverage area the tree or fish are, only that the returns were received from the same depth.

 

 

Branches

Enlarged

EnlargedBranches

 

Transducer

 

Transducer

View

Fish

View

Fish

 

Example 1.

Example 2.