Humminbird 4089701 Marine GPS System User Manual


 
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The Down Imaging™ models (561 DI, 570
DI, 571 HD 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
from the 200 kHz (25°) beam will be
displayed in the Down Imaging™
Views.
When set to 455 kHz, only the returns
from the 455 kHz (16°) narrow beam
will be displayed in the Down
Imaging™ Views.
75 Degree Total Coverage
16°
25°
455kHz
200kHz
75°
455kHz
45°
800kHz
Sonar Menu Tab