Garmin GPS 125 Sounder - Manual (Page 65)

Keel Offset
This setting allows you to set the point from which
the GPS 125 Sounder will measure depth. This makes
it possible to measure depth from the bottom of the
keel instead of from the transducer’s location. A posi-
tive number will measure depth from a deeper point
while a negative number reflects a shallower point.
To set keel offset:
1. Highlight the ‘KEEL’ field and press
F
. The value
field will be highlighted.
2. Select plus (+) or minus (-) and press
F
. The high-
light will move to the value field.
3. Enter the desired offset value using the arrow keypad
and press
F
.
Sounder Alarms
This field allows you to set shallow and deep depth
alarms and an alarm for specific-sized fish/targets Three
options are available:
• Shallow water - Has an on/off setting and a depth
value field
• Deep water - Has an on/off setting and a depth
value field
• Fish - Has an on/off setting and a
medium/large/all size field
To set a sounder alarm:
1. Highlight the desired alarm and press
F
. The on/off
setting will be highlighted.
2. Use the arrow keypad to select ‘ON’ or ‘OFF’ and
press
F
. The highlight will move to the value field.
3. Enter the desired value using the arrow keypad and
press
F
.
61
REFERENCE
Keel Offset &
Sounder Alarms
The alarms can be set to
activate at a specified shal-
low and deep water depth
and when any sonar targets
appear.
Use the keel offset to cus-
tomize the point used to
measure depth.
125 Man Rev B 7/23/98 11:48 AM Page 61