Lowrance electronic Lowrance Fish-finding Sonar & Mapping GPS LMS-520C - Manual (Page 72)

62
Alarms
This unit has three different types of sonar alarms. The first is the Fish
Alarm. It sounds when the Fish I.D.
™ feature determines that an echo
is a fish.
Another alarm is the Zone Alarm, which consists of a bar on the side of
the screen. Any echo on the chart that appears inside this bar triggers
this alarm.
The last alarm is the Depth Alarm, which has both a Shallow and a
Deep setting. Only the bottom signal will trigger this alarm. This is
useful as an anchor watch, a shallow water alert or for navigation.
Depth Alarms
The depth alarms sound a tone when the bottom signal goes shallower
than the shallow alarm's setting or deeper than the deep alarm's set-
ting. For example, if you set the shallow alarm to 10 feet, the alarm
will sound a tone if the bottom signal is less than 10 feet. It will con-
tinue to sound until the bottom goes deeper than 10 feet.
The deep alarm works just the opposite. It sounds a warning tone if the
bottom depth goes deeper than the alarm's setting. Both depth alarms
work only off the digital bottom depth signals. No other targets will trip
these alarms. These alarms can be used at the same time or individually.
Main Menu with GPS Alarms selected (left). Sonar Alarms menu
(right).
To adjust and turn on the shallow alarm:
1. Press
MENU
|
MENU
| ↓ to
A
LARMS
|
ENT
| ↓ to
S
ONAR
A
LARMS
|
ENT
.
2. Press → to
S
HALLOW
A
LARM
D
EPTH
|
ENT
.
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