Advanced Operators module

The Advanced Operator module allows you to:

  • Manipulate your data by creating new virtual echograms from existing ones using advanced operators and algorithms.
  • Compare frequencies, apply quality controls, classify data, and more.
  • Add enhanced background and noise removal.

Virtual echograms can be used in real time with Simrad Ex60, EK80 and Ex500 echosounders when the Survey Suite module is licensed.

If you have questions about this module, any of its features or would like to discuss pricing, please contact

Advanced data analysis techniques

dB difference echograms

Figure 1. The dB difference technique. Shown are dB difference echograms. The dataflow is discussed in dB difference Absolute.

3 color technique

Figure 2. A 3 color technique implemented by the 3 Color Maximum operator. A color for each frequency, representing identified biomass in the water column.

Derobertis Z score technique

Figure 3. Species ID using the De Robertis Z-score technique. Images show: species frequency response data; technique stages in an Echoview dataflow; the Z-score equation and echograms showing how the sample data is partitioned by the Z-score technique. The equations are implemented by the Formula operator.

Specific features


Over 70 operators are available through the Advanced Operators module. These operators facilitate the manipulation of echogram data in complex ways and allow advanced analysis beyond the scope of operators in other modules.

Operations/features with virtual variables licensed in the Advanced Operators module

  • Export data from operators.
  • Create lines on a virtual variable.
  • Create or detect surfaces on a virtual variable.
  • Define regions on a virtual variable.
  • Edit fish tracks on a virtual variable. Also requires a licensed Fish Tracking or Multibeam Fish Tracking module.
  • Use of the Threshold Response graph, Frequency Response graph and Relative mean dB graph with virtual variables.
  • Copy a selection on a virtual variable.
  • Detect schools on a virtual variable. Also requires a licensed School Detection module.
  • Detect schools on a virtual variable during live viewing. Also requires a licensed School Detection module and Survey Suite module.

Note: In a virtual variable chain, the final variable in the chain is subject to the licensing conditions of any previous operators in the chain.

See also

About Echoview modules
Licenses and demonstration mode
Operator licensing in Echoview