Bottom Style (3D Sonar Views Only); Frame Style (3D Sonar Views Only); 2D Beam Select - Humminbird 748 3D Operation Manual

3D Bottom Style selects the bottom style used in the 3D Sonar View.
3D Frame Style selects the frame style used in the 3D Sonar View.
Beam Select or 2D Beam Select sets which sonar returns from the transducer
will be displayed on the screen.
When Beam Select is set to 455 kHz, the returns from the 455 kHz narrow
beams will be displayed in all views, and the maximum depth capability of your
unit will be 240 ft (75 m).
When the depth is greater than 240 ft (75 m), Beam Select should be set to
83 kHz. The unit will continue to acquire sonar returns below 240 ft and will be
displayed in the 2D Sonar View.
NOTE: It is important to re-set Beam Select to 455 kHz when returning to water
shallower than 240 ft (75 m) for maximum performance in the 3D views.
Sonar Menu Tab
3D Bottom Style
(3D Sonar Views only)
Settings: Grid Only, Shaded with Grid, Shaded, Default =
Shaded with Grid
3D Frame Style
(3D Sonar Views only)
Settings: Simple, 2, 3, 4, Complex, Default = 3

2D Beam Select

Settings: 455 kHz, 83 kHz; Default = 455 kHz
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