Lowrance Mark series DSI Operation Manual page 7

Noise rejection: counteracts sonar signal
interference by reducing onscreen clutter.
Surface Clarity: reduces clutter near the
water's surface (Advanced mode only).
Color
Changes the look of the display using palettes
with varying degrees of color and brightness.
Color sonar
Monochrome DSI
Color DSI
5
Features
Range: selects the
section of the water
column shown on the
display
Stop sonar: pauses the sonar
screen
Fishing Mode (Traditional)
Fishing modes are preset
packages of sonar set-
tings geared to specific
fishing conditions.
Sonar Operation
Frequency:
selects transducer
frequency