Garmin GPSMAP 2108 - Manual (Page 32)

28 GPSMAP ® 2008/2108 Owner’s Manual
C
onfigUring The
U
niT
Off Course—set an alarm to sound when you are off
course by a specified distance.
Setting System Alarms
To set a system alarm, from the Home screen, select
Configure > 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
Configure > Alarms > sonar .
shallow Water/Deep Water—set an alarm to
sound when the depth is less than or greater than the
specified 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 specified temperature.
Fish—set an alarm to sound when the unit detects a
suspended target of the specified 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.
Configuring My Boat
To configure settings for your boat, from the Home
screen, select Configure > 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