Interpreting the Sonar display ContentsFactors influencing the sonar displayThe quality and accuracy of the sonar display can be influenced by a number of factors including vessel speed, target depth, target size, background noise, interference, and transducer frequency. Understanding these factors can assist you in interpreting what the sonar is displaying.Interpreting the bottomThe bottom is represented by a solid line at the bottom of the screen and usually produces a strong echo. As a general rule: the thicker the bottom line, the harder the bottom.Interpreting objects on the sonar displayThe size at which a target appears on the sonar display is dependent on many factors, and may not be proportional to its actual physical size.ThermoclinesA thermocline is a distinct transition layer in the water which separates warmer surface water from colder, denser, deeper water.Previous topic: LightHouse Sport software release historyNext topic: Interpreting the radar display