Configuring the Echo Sounder

Configure the echo sounder settings of the Catch Navigator.

Procedure

  1. To select the direction of the sounding, click in Sounding Mode, then choose a Mode between Down only or Down + Down2, if this later option is activated.
  2. Go back to the page, then click in Down Sounding or Down2 Sounding, depending on the Sounding Mode that was configured.

  3. Default Frequency (Hz) is 165,000 Hz for the Down Sounding and Down2 Sounding.
  4. The Range (m) of the sounding is the maximum distance at which targets and bottom can be detected.
    Note: We recommend to set the maximum range value when using the automatic range in order to see the sea bottom as soon as possible.
  5. Select a Pulse Type to have an appropriate length of pulse according to the distance to the bottom:
    • Short: shallow waters (100 μs)
    • Medium: moderate depth (300 μs)
    • Long: deep waters (500 μs)
    Important: Pulse length is an important setting for the calibration of the sensor. If you change the pulse length on a sensor calibrated for target strength, you need to calibrate the sensor again.
  6. Select a TVG setting to compensate the signal loss in water and have targets or sea bottom displayed in the same color on the echogram, whatever the distance from the sensor:
    • 20 log: focus on bottom or school of fish.
    • 40 log: focus on individual targets.
    • 30 log: compromise between the two above settings.
  7. Set the Detection Threshold (dB TS) to -79 if you want to detect small targets. Otherwise, leave the default settings at -73 dB.
  8. Do not change the other echo sounder settings.