New in Echoview 4.40
for users of data from BioSonics echosounders

This page summarizes the new features, improvements and other changes that have been implemented in Echoview 4.40 which specifically affect the use of data from Biosonics echosounders.

Biosonics Calibration page redesign

The Calibration page of the Variable Properties dialog box has been redesigned to present an interface similar to the Calibration page for virtual variables. Entering calibration values continues to be simple. The outcome is that you have better information about your variable's calibration values.

New TVG range correction setting

A new TVG range correction setting on the Calibration page of the Variable Properties dialog box has been introduced for Biosonics raw variables. This setting allows you to nominate a TVG range correction algorithm to apply to your Sv and TS data. The significance of TVG range correction is discussed in the topic About time varied gain.

Biosonics .dt4 file support clarification

Additional documentation for *.dt4 file support, adds the following note to the Calculation section: Echoview does not read or use the value for UserCalCorrection.

See also: New in Echoview 4.40 for all users for a description of changes that may affect you but are not specific to data from BioSonics echosounders.