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Units Speed. Units of Speed allows the selection of MPH (statute miles per hour), or KTS (nautical miles per hour). Use the Arrow buttons to highlight the desired selection.
Units Depth. Only available on metric versions, the Units Depth function allows the user to select the units of measurement for the depth readout. FEET and METERS are available. The 400TX remembers this selection even when the unit is powered off.
Fish ID. There are three selections available: Off, ID+ ON, and Adjust. The factory setting is ID+ On. With Fish ID Off, sonar returns are displayed as "raw" information. There is no interpretation made by the unit. Selecting ID Off also disables the fish alarm.
ID+ On enables the 400TX to interpret the raw sonar data and, using a variety of techniques, depict appropriate target returns as one of three different size fish symbols. Further identification shows which beam the fish is detected in. The 400TX also displays the depth beneath the surface with the corresponding fish symbol.
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 onscreen. In this case smaller sonar returns will be depicted as fish symbols. This is useful for identifying many smaller sonar
will be depicted as fish symbols. This is useful for identifying many smaller sonar returns (such as baitfish) as fish symbols.
Decreasing the value to a number less than zero shows fewer fish symbols
The 400TX remembers this selection even when the unit is powered off.
Numeral Size. Two options are available: Big and Small. The factory setting is Big. With this setting, the digital depth and speed and temp numerals are drawn large enough to be read from across the boat. The big numerals occupy space on the display that could be used for the graphics area. Hence, the small numerals option. With small numerals selected, a greater amount of the display area is available for the graphic view. This effectively increases the display resolution of the unit.
Numeral Size settings are remembered when powered off.