Furuno GP-1640F, Operator'S Manual, Page: 25 / 108

2-9
2.12 Alarms
Bottom alarm
The bottom alarm sounds when the bottom
echo is within the alarm range set. To activate
the bottom alarm the depth must be displayed.
Fish (B/L) alarm
The bottom-lock fish alarm sounds when a fish
echo is within a predetermined distance from
the bottom.
Fish (normal) alarm
The normal fish alarm sounds when a fish
echo is within the preset alarm range.
Note:
The sensitivity of the fish alarm can be
set on the SOUNDER SYSTEM SETUP
menu.
Water temperature alarm
There are two types of water temperature
alarms: WITHIN and WITHOUT. The WITHIN
alarm sounds when the water temperature is
within the range set; the WITHOUT alarm
sounds when the water temperature is higher
or lower than the range set. This alarm
requires water temperature data.
Activating/deactivating an alarm
1. Press the [ALARM] key to open the alarm
menu.
2. Press the NEXT PAGE soft key to show the
ALARM2 menu.
GPS 3D
ALARM2
EDIT
CLEAR
ALARM
ALARM INFORMATION
BOTTOM ALARM
FISH (B/L) ALARM
FISH (NORMAL)
TEMP. ALARM OFF
OFF
OFF
OFF
NO ALARM
RETURN
Alarm2 menu
3. Select the menu item, and press the EDIT
soft key.
4. Select ON or OFF. For ON, use the cursor
pad and the numeric keys to set range.
5. Press the ENTER soft key.
When an alarm setting is violated…
When an alarm setting is violated the buzzer
sounds, and the speaker icon appears at the
bottom of the screen. You can silence the
buzzer with the [CLEAR] key. (However, the
buzzer will sound whenever the alarm setting
is violated.) Press the [ALARM] key to find out
which alarm has been violated. The offending
alarm is displayed in the ALARM
INFORMATION window. Press the CLEAR
ALARM soft key to erase the alarm indication.
The alarm icon remains displayed until all
violated alarms have been acknowledged.