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Decreasing the value to a number less than zero shows
fewer fish symbols on-screen. In this case smaller sonar
returns are disregarded. This is useful for eliminating many
small sonar returns when seeking larger species of fish.
The
405SX 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.
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.
Speed Offset. The Speed Offset option allows the user
to compensate for differences in hull design, and its
effect on the accuracy of the speed measurement. If
there is a discrepancy between the indicated speed and
another speed measurement device on the boat, the
speed measurement can be varied to improve 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 depth measurement
is made. Selecting a positive value adds distance to the
measurement. If the transducer is mounted
1 metre
beneath the waterline, a positive
1 will show the correct
depth from the surface of the water.
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USING THE 405SX
MENU FUNCTIONS