Lowrance M68C IceMachine, Installation And Operation Instructions Manual

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In the Ice Flasher, the weakest signals are shown in black and the
strongest signals show as red. Fish are among the weakest echoes, so
they show up mostly as black and blue bands on the flasher screen. The
hardest surfaces, like the bottom, show as red. Cover in the form of
weed beds or submerged timber display in the blue to yellow range.
Battery Gauge
The Ice Flasher has a battery gauge that shows the capacity of the re-
chargeable battery. When the battery is fully charged, the gauge is
filled with green. As power is consumed, the fill level drops and turns to
yellow (70 percent charged) and red (30 percent). When the gauge
shows 0 percent, you should turn off the unit to save your settings, and
then recharge the battery.
This battery gauge is solid green, indicating a full charge.
Sonar Signal Interpretation
When you monitor your flasher screen for signs of fish, there are three signal
band characteristics to watch for: movement, color and thickness.
Signal band movement
In a stationary setting like ice fishing, the bottom, structure and cover
will show on the flasher screen as stationary bands of color. Signals
between the surface and the bottom that come and go or move up and
down (even slightly) will be fish that have appeared inside the sonar
signal cone.
Signal band color
The color of the signal bands correspond to both fish size and their posi-
tion in the sonar signal cone. Black and blue signals tend to be smaller
fish, or fish that are at the outside edge of the sonar cone. These
smaller or more distant fish return weaker echoes.
Battery charge
indicator