Garmin GPSMAP1222 Owner'S Manual Download

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Advanced Sonar Settings

From a Traditional sonar view, select MENU > Sonar Setup > Advanced.
Shift: Allows you to set the depth range on which the sonar is focused. This allows you to zoom in a higher

resolution in the focused depth.
When using shift, bottom tracking may not work effectively, because the sonar looks for data within the depth
range of the focused area, which may not include the bottom. Using shift also can impact the scroll speed,
because data outside the depth range of the focused area is not processed, which reduces the time required
to receive and display the data. You can zoom in to the focused area, which enables you to evaluate target
returns more closely at a higher resolution than just zooming alone.

Btm. Srch. Limit: Limits the search for the bottom to the depth selected when the Range setting is set to Auto.

To minimize the length of time it takes to find the bottom, you can select a depth to limit the search for the
bottom. The device will not search for the bottom deeper than the selected depth.

Transducer Installation Settings

These settings apply to the following types of sonar.
• Traditional
• Garmin ClearVü
• Garmin SideVü
From an applicable sonar view, select an option.
• From a Traditional sonar view, select MENU > Sonar Setup > Installation.
• From a Garmin ClearVü sonar view, select MENU > ClearVü Setup > Installation.
• From a Garmin SideVü sonar view, select MENU > SideVü Setup > Installation.
Transmit Rate: Sets the length of time between sonar pings. Increasing the transmit rate increases the scroll

speed, but it may also increase self-interference.
Reducing the transmit rate increases the spacing between transmit pulses and can resolve self-interference.
This option is available on the Traditional sonar view only.

Transmit Power: Reduces transducer ringing near the surface. A lower transmit power value reduces transducer

ringing, but can also reduce the strength of the returns. This option is available on the Traditional sonar view
only.

Filter Width: Defines the edges of the target. A shorter filter more clearly defines the edges of the targets but

may allow more noise. A longer filter creates softer target edges and may also reduce noise. This option is
available on the Traditional sonar view only.

Flip Left/Right: Switches the SideVü view orientation from left to right. This option is available on the SideVü

sonar view only.

Restore Sonar Defaults: Restores the sonar settings to the factory default values.
Transducers: Allows you to change the transducer, view details about the transducers, and save details to a

memory card.

Transducers > Manual Configuration: Allows you to set manual transducer configuration parameters on a

compatible sonar module. See the installation instructions for your compatible sonar module for more details
on connecting and manually configuring a transducer.

Sonar Fishfinder