Lowrance M52 S/GPS Installation And Operation Instructions Manual page 56

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
The Sonar Chart Limits menu appears, with Upper Limit selected.
2. To set the upper limit, press
correct, then → to move to the second digit. Repeat until the depth is
correct, then press
3. To set the lower limit, press ↓ to
the first digit is correct, then → to move to the second digit. Repeat un-
til the depth is correct, then press
Area "zoomed"
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.
MENU
ENT
.
EXIT
|↓ to
U
PPER
. Press ↑ or ↓ until the first digit is
|
L L
OWER IMIT
| |
EXIT EXIT EXIT
50
A L L
ND OWER IMITS
. Press ↑ or ↓ until
ENT
.
| .
ENT