Lowrance electronic M68C IceMachine - Manual (Page 59)

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Changing the upper and lower limits gives you far greater control over
the depth range. This feature lets you "zoom in" the display in almost
unlimited combinations. Nearly any segment of the water column, from
the surface to the bottom can be shown. This enlarges the sonar targets
to best suit your fishing needs and water conditions.
At left, Sonar Page Menu with Upper and Lower Limits command se-
lected. At right, Sonar Chart Limits menu, with Upper Limit selected.
To change the upper and lower limits:
1. From the Sonar Page, press
MENU |
↓ to
U PPER A ND L OWER L IMITS
| ENT .
The Sonar Chart Limits menu appears, with Upper Limit selected.
2. To set the upper limit, press ENT . Press
↑ or ↓ until the first digit is
correct, then
→ to move to the second digit. Repeat until the depth is
correct, then press EXIT .
3. To set the lower limit, press
↓ to
L
OWER
L
IMIT
| ENT . Press
↑ or ↓ until
the first digit is correct, then
→ to move to the second digit. Repeat un-
til the depth is correct, then press EXIT | EXIT | EXIT .
Normal display, in auto depth range mode, left. At right, display
"zoomed" with Upper and Lower Limits focusing on the portion
of the water column from 10 feet to 20 feet deep.
Area "zoomed"