Let A be the set of samples s in the analysis domain being considered. Then:

where

= The mean range of samples in the domain , range_mean (m) rs= The range of sample s in the domain (m) =

0 if sample s is:

- above an
Exclude above line

and/or- below an
Exclude below line

and/or- a no-data sample and
Include the volume of no-data samplesis not selected

Note: No-data samples may occur in a number of ways (no-data samples, samples within

applied bad data (no data) regions and samples in pings with a bad line status).

For further information refer to About analysis domains: Analysis based on regions and samples1 otherwise, including below threshold data.

Depth_mean is the projection of Range_mean onto the vertical axis taking transducer geometry into account. For a vertically mounted transducer pointing directly downwards, Depth_mean and Range_mean differ by the transducer draft only.

About analysis domains

About transducer geometry

About depth, range and altitude

Samples