Humminbird 405SX manual Blacken in the display below the bottom. This gives

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Bottom Black View

USING THE 405SX

MENU FUNCTIONS

Bottom Black. There are two selections available: Off and On. The factory setting is Off. With this setting, the 405SX displays the bottom using 4 level grayscale. This allows you to determine the texture and

relative hardness of the bottom. Selecting Bottom Black “ON” causes the unit to

blacken in the display below the bottom. This gives the

user easiest recognition of the bottom location, even from a

great distance.

The 405SX remembers the Bottom Black setting when powered off.

Fish ID. There are three selections available: Off, ID+

ON, and Adjust. The factory setting is ID+ OFF. With Fish ID

Off, sonar returns are

displayed as “raw” information. There is no interpretation made by the unit. Selecting ID ON also enables the fish alarm.

ID+ On enables the to interpret the raw sonar data and,

using a variety of techniques, depict appropriate target ID+ On Raw Sonar returns as one of three different size fish symbols. Further

identification shows which beam the fish is detected in.

The 405SX 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 on-screen. In this case smaller sonar returns will be depicted as fish symbols. This is useful for identifying many smaller sonar returns (such as bait fish) as fish symbols.

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Contents 405SXSINGLEBEAMfishfinder Operations ManualThank YOU Table of Contents Installation Preparation AccessoriesInstallation Overview Parts SuppliedInstallation Overview Determining How to Mount TransducerAlternate Transducers and Mounting Methods Alternate Transducers and Mounting MethodsPortable Mounting Trolling Motor MountingBeginning Installation Beginning InstallationUsing the 405SX HOW Sonar WorksHOW Sonar Works Simulator OperationFeature Memory Simulator OperationWhat You See On-Screen What YOU see ON-SCREEN To best represent those conditions on-screen Water interferes with SonarScreen as regular clusters of ind What YOU see on Screen Fish ID. The 405SX uses Instance, a small schoolControl Functions Control Functions2D View Large Digit View Chart View Menu Functions Menu Functions Sensitivity. The Sensitivity function controlsDepth Range Using the 405SX Bottom return. The left Side of the screen is a Lower Zoom LimitUsing the 405SX Triplog Using the 405SX Blacken in the display below the bottom. This gives Speed offset is remembered after power is disconnected Using Diagnostic Using the Diagnostic FeatureMaintenance MaintenanceMAINTENANCE/TROUBLESHOOTING TroubleshootingNothing happens when I turn the unit on There is no transducer detected There is no bottom reading visible on the displayTroubleshooting Unit comes on before I press POWER, and won’t turn offMy unit loses power at high speeds Get gaps in the reading at high speedsMAINTENANCE/WARRANTY WARRANTY/SERVICE PolicyHumminbird ONE Year Full Warranty Service PolicyCustomer Support Customer SupportFurther information on Humminbird products can be found at Specifications Page TOP
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