Humminbird 561 Operation Manual page 58

45°
455kHz
16°
455kHz
25°
200kHz
75 Degree Total Coverage
Sonar Menu Tab
The Down Imaging™ models (570 DI) allow
you to choose 200 kHz or 455 kHz for conical
sonar coverage in the traditional sonar views.
• When set to 200 kHz, only the returns
800kHz
75°
• When set to 455 kHz, only the returns
from the 200 kHz (25°) beam will be
displayed in the Down Imaging™
Views.
from the 455 kHz (16°) narrow beam
will be displayed in the Down
Imaging™ Views.
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