Hummingbird Communications 425SX Operation Manual

31, 29 If you are using a transducer switch to connect two transducers to the 425SX, ensure the switch is in the correct position to connect a transducer that is in water. (If a trolling motor transducer is selected and the trolling motor is out of water, no sonar information appears.) If non…

21, Hummingbird Communications 425SX In “Manual” Zoom, the Zoom range does not move as the terrain changes. To operate Zoom, press MENU repeatedly until the Zoom menu is on- screen. Three options are available: “Off” (Factory Setting), “Auto” (Automatic bottom tracking Zoom), and “Manual” (User contr…

27, ADVANCED FEATURES USING DIAGNOSTIC accuracy. Remember, the speed paddle wheel measures speed through the water, not speed over ground. Speed offset is remembered after power is disconnected. Depth Offset. The Depth Offset allows the user to select the point on the boat from which the …

26, Selecting Adjust and making incremental changes enhances the fishfinder’s ability to identify sonar returns as fish symbols. Increasing the value to a number greater than zero shows more fish symbols on-screen. In this case smaller sonar returns will be depicted as fish symbols. This is usefu…

10, At initial power-up, the 425SX uses settings that were set at the factory. After initial use, the 425SX will remember the settings you enter. There are several elements on-screen that are common to all modes of operation. Temperature/Speed. The initial screen layout takes one of two basic forms…