Garmin GPSMAP A12, Owner'S Manual

4

Repeat steps 2–3 to configure additional input or output 

ports.

NMEA 2000 Settings

Select 

Settings

 > 

Communications

 > 

NMEA 2000 Setup

.

Device List

: Displays the devices connected to the network.

Label Devices

: Changes the labels for available connected 

devices.

Naming Devices and Sensors on the Network

You can name devices and sensors connected to the Garmin 

Marine Network and the NMEA 2000 network.

1

Select 

Settings

 > 

Communications

.

2

Select 

Marine Network

 or 

NMEA 2000 Setup

 > 

Device List

.

3

Select a device from the list on the left.

4

Select 

Change Name

.

5

Enter the name, and select 

Done

.

Marine Network

The Marine Network allows you to share data from Garmin 

peripheral devices with the chartplotters quickly and easily. You 

can connect a chartplotter to the Marine Network to receive data 

from and share data with other devices and chartplotters that 

are compatible with the Marine Network.
Select 

Settings

 > 

Communications

 > 

Marine Network

.

Setting Alarms

Navigation Alarms

Select 

Settings

 > 

Alarms

 > 

Navigation

.

Arrival

: Sets an alarm to sound when you are within a specified 

distance or time from a turn or a destination.

Anchor Drag

: Sets an alarm to sound when you exceed a 

specified drift distance while anchored.

Off Course

: Sets an alarm to sound when you are off course by 

a specified distance.

Setting the Anchor Drag Alarm

You can set an alarm to sound if you have moved more than an 

allowable distance. This is very useful when anchoring 

overnight.

1

Select 

Settings

 > 

Alarms

 > 

Navigation

 > 

Anchor Drag

.

2

Select 

Alarm

 to turn on the alarm.

3

Select 

Set Radius

, and select a distance on the chart.

4

Select 

Back

.

System Alarms

Alarm Clock

: Sets an alarm clock.

Unit Voltage

: Sets an alarm to sound when the battery reaches 

a specified low voltage.

GPS Accuracy

: Sets an alarm to sound when the GPS location 

accuracy falls outside the user-defined value.

Sonar Alarms

NOTE: 

Not all options are available on all transducers.

From an applicable sonar view, select 

Menu

 > 

Sonar Setup

 > 

Alarms

.

You can also open the sonar alarms by selecting 

Settings

 > 

Alarms

 > 

Sonar

.

Shallow Water

: Sets an alarm to sound when the depth is less 

than the specified value.

Deep Water

: Sets an alarm to sound when the depth is greater 

than the specified value.

FrontVü Alarm

: Sets an alarm to sound when the depth in front 

of the vessel is less than the specified value, which can help 

you avoid running aground (

Setting the FrontVü Depth Alarm

, 

page 30

). This alarm is available only with Panoptix FrontVü 

transducers.

Water Temp.

: Sets an alarm to sound when the transducer 

reports a temperature that is 2°F (1.1°C) above or below the 

specified temperature.

Contour

: Sets an alarm to sound when the transducer detects a 

suspended target within the specified depth from the surface 

of the water and from the bottom.

Fish

: Sets an alarm to sound when the device detects a 

suspended target.
•

 sets the alarm to sound when fish of all sizes are 

detected.

•

 sets the alarm to sound only when medium or large 

fish are detected.

•

 sets the alarm to sound only when large fish are 

detected.

Setting Weather Alarms

Before you can set weather alarms, you must have a compatible 

chartplotter connected to a weather device, such as a GXM 

device, and have a valid weather subscription.

1

Select 

Settings

 > 

Alarms

 > 

Weather

.

2

Turn on alarms for specific weather events.

Setting the Fuel Alarm

Before you can set a fuel level alarm, a compatible fuel flow 

sensor must be connected to the chartplotter.
You can set an alarm to sound when the total amount of 

remaining onboard fuel reaches the level you specify.

1

Select 

Settings

 > 

Alarms

 > 

Fuel

 > 

Set Total Fuel Onboard 

> 

On

.

2

Enter the remaining amount of fuel that triggers the alarm, 

and select 

Done

.

My Vessel Settings

NOTE: 

Some settings and options require additional charts or 

hardware.
Select 

Settings

 > 

My Vessel

.

Depth and Anchoring

: Allows you to enter information about 

the keel (

Setting the Keel Offset

, page 21

) and the anchor.

The Anchor Height value is the height of the anchor above 

the waterline. The Anchor Scope value is the ratio of the 

length of anchor rode in use to the vertical distance from the 

bow of the vessel to the bottom of the water. These anchor 

settings are used to calculate the Target Anchor Rode date 

field.

Temp. Offset

: Allows you to set an offset value to compensate 

for the water temperature reading from a NMEA 0183 water-

temperature sensor or a temperature-capable transducer 

(

Setting the Water Temperature Offset

, page 55

).

Calibrate Water Speed

: Calibrates the speed-sensing 

transducer or sensor (

Calibrating a Water Speed Device

, 

page 55

).

Fuel Capacity

: Sets the combined fuel capacity of all the fuel 

tanks on your vessel (

Setting the Fuel Capacity of the Vessel

, 

page 42

).

Vessel Type

: Enables some chartplotter features based on the 

boat type.

CZone™

: Sets the digital switching circuits.

System Profiles

: Allows you to save your system profile to a 

memory card and import system profile settings from a 

memory card. This can be helpful for charter or fleet vessels, 

and for sharing your setup information with a friend.

54

Device Configuration