An introduction to sidescan sonar — how it works, what it measures, and how to interpret the imagery.

A deeper look at sidescan sonar operations, towfish geometry, range selection, and survey planning.

A lecture by Charles Brennan tracing the history and ongoing importance of hydrographic surveying.

How grazing angle affects multibeam backscatter response, and what it means for multispectral analysis.

Why DGPS is no longer the right choice for positioning in hydrographic surveys, and what to use instead.