Garmin GPSMAP 2108 Fish Finder User Manual


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28 GPSMAP
®
2008/2108 Owner’s Manual
Co n f i g U r i n g T h e Un i T
Off Course—set an alarm to sound when you are off
coursebyaspecieddistance.
Setting System Alarms
To set a system alarm, from the Home screen, select
Congure > Alarms > System.
Clock—set an alarm using the system clock. The unit
must be on for the clock alarm to work.
Battery—set an alarm to sound when the battery
reaches a user-determined low voltage.
GPS Accuracy—set an alarm to sound when the GPS
location accuracy falls outside the user-determined
value.
Setting Sonar Alarms
To set a sonar alarm, from the Home screen, select
Congure > Alarms > Sonar.
Shallow Water/Deep Water—set an alarm to
sound when the depth is less than or greater than the
speciedvalue.
Water Temp—set an alarm to sound when the
transducer reports a temperature that is 2° F (1.1° C)
aboveorbelowthespeciedtemperature.
Fish—set an alarm to sound when the unit detects a
suspendedtargetofthespeciedsymbols.
NOTE: You must have a transducer connected.
If your unit does not have a built-in sounder, then
youmustinstallaGSD21orGSD22sounder
module to receive sonar information.
Conguring My Boat
Toconguresettingsforyourboat,fromtheHome
screen, select Congure > My Boat.
Auto Guidance—set the Auto Guidance parameters
for your boat:
•
Safe Depth—set the minimum depth (referred
to the chart depth datum) to allow when
calculating an auto guidance path.
• Safe Height—set the minimum height (referred
to the chart height datum) of a bridge that your
boat can safely travel under.
Keel Offset—offset the surface reading for the depth
of a keel. This makes it possible to measure depth
from the bottom of your keel instead of from the
transducer’s location. Enter a positive number to
offset for a keel. You can enter a negative number to
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