Sloping sea floor near a Bridge Piling

In the main window, a 3D image of the sea floor is shown with color mapped to depth. Note that the water is deeper to the port of the vessel. This corresponds to the chart. A bridge piling is just cominging into view at about 500m range. This is an example of the sonar operating with the wide, 90 degree field-of-view. The entire 3D image is generated with a single ping.