Gates are used to keep noise or interference out of the bottom detection process.
Gates are Enabled or Disabled using the check the box in front of Enable Gates.
Gates are absolute. This means if you set the gates and they block out the bottom, that data will be lost.
The R2Sonic MBES have gates that can be set for a minimum depth, maximum depth and the seabed slope. The gates can be changed manually or the user can turn on GateTrac, and Sonic Control will automatically set Depth or Depth and Slope based on a percentage of the nadir depth.
GateTrac requires that the data be without noise or interference. If there is interference, deselect Enable Gates until the interference has passed.
You can set Manual gates using the left and right mouse buttons. The left mouse button will reduce the setting. The right mouse button will increase the setting. Manual gates can also be set using the mouse. The left mouse button will move the gate individually by positioning the cursor on the gate line, then left clicking to drag the gate up and down. Using the right mouse button will move both the minimum and maximum depth simultaneously when you click on either of the lines.