Adjusting The Distance From Shore; Communications Settings; Nmea 0183 Settings; Configuring Nmea 0183 Output Sentences - Garmin GPSMAP A12 Owner's Manual

NOTE: Auto Guidance is available with premium charts, in some
areas.
NOTE: Not all settings apply to all maps.
You can set the parameters the chartplotter uses when
calculating an Auto Guidance path.
Preferred Depth: Sets the minimum water depth, based on
chart depth data, that your boat can safely travel over.
NOTE: The minimum water depth for the premium charts
(made before 2016) is 3 feet. If you enter a value of less than
3 feet, the charts only use depths of 3 feet for Auto Guidance
path calculations.
Vertical Clearance: Sets the minimum height of a bridge or
obstacle, based on chart data, that your boat can safely
travel under.
Shoreline Distance: Sets how close to the shore you want the
Auto Guidance path to be placed. The Auto Guidance path
may move if you change this setting while navigating. The
available values for this setting are relative, not absolute. To
ensure that the Auto Guidance line is placed the appropriate
distance from shore, you can assess the placement of the
Auto Guidance path using one or more familiar destinations
that require navigation through a narrow waterway
the Distance from Shore, page

Adjusting the Distance from Shore

The Shoreline Distance setting indicates how close to the shore
you want the Auto Guidance line to be placed. The Auto
Guidance line may move if you change this setting while
navigating. The available values for the Shoreline Distance
setting are relative, not absolute. To ensure the Auto Guidance
line is placed the appropriate distance from shore, you can
assess the placement of the Auto Guidance line using one or
more familiar destinations that require navigation through a
narrow waterway.
1 Dock your vessel or drop the anchor.
2
Select Settings > Preferences > Navigation > Auto
Guidance > Shoreline Distance > Normal.
3
Select a destination that you have navigated to previously.
4 Select Navigate To > Auto Guidance.
5
Review the placement of the Auto Guidance line, and
determine whether the line safely avoids known obstacles
and the turns enable efficient travel.
6
Select an option:
• If the placement of the Auto Guidance line is satisfactory,
select Menu > Navigation Options > Stop Navigation,
and proceed to step 10.
• If the Auto Guidance line is too close to known obstacles,
select Settings > Preferences > Navigation > Auto
Guidance > Shoreline Distance > Far.
• If the turns in the Auto Guidance line are too wide, select
Settings > Preferences > Navigation > Auto Guidance
> Shoreline Distance > Near.
7
If you selected Near or Far in step 6, review the placement of
the Auto Guidance line, and determine whether the line
safely avoids known obstacles and the turns enable efficient
travel.
Auto Guidance maintains a wide clearance from obstacles in
open water, even if you set the Shoreline Distance setting to
Near or Nearest. As a result, the chartplotter may not
reposition the Auto Guidance line, unless the destination
selected requires navigation through a narrow waterway.
8
Select an option:
• If the placement of the Auto Guidance line is satisfactory,
select Menu > Navigation Options > Stop Navigation,
and proceed to step 10.
Device Configuration
(Adjusting
19).
• If the Auto Guidance line is too close to known obstacles,
select Settings > Preferences > Navigation > Auto
Guidance > Shoreline Distance > Farthest.
• If the turns in the Auto Guidance line are too wide, select
Settings > Preferences > Navigation > Auto Guidance
> Shoreline Distance > Nearest.
9 If you selected Nearest or Farthest in step 8, review the
placement of the Auto Guidance line, and determine
whether the line safely avoids known obstacles and the turns
enable efficient travel.
Auto Guidance maintains a wide clearance from obstacles in
open water, even if you set the Shoreline Distance setting to
Near or Nearest. As a result, the chartplotter may not
reposition the Auto Guidance line, unless the destination
selected requires navigation through a narrow waterway.
10 Repeat steps 3 through 9 at least once more, using a
different destination each time, until you are familiar with the
functionality of the Shoreline Distance setting.

Communications Settings

NMEA 0183 Settings

Select Settings > Communications > NMEA 0183 Setup.
Port Types: See Setting the Communication Format for Each
NMEA 0183 Port, page
Output Sentences: See Configuring NMEA 0183 Output
Sentences, page 53.
Position Precision: Adjusts the number of digits to the right of
the decimal point for transmission of NMEA output.
XTE Precision: Adjusts the number of digits to the right of the
decimal point for NMEA crosstalk error output.
Waypoint IDs: Sets the device to transmit waypoint names or
numbers via NMEA 0183 while navigating. Using numbers
may resolve compatibility issues with older NMEA 0183
autopilots.
Restore Defaults: Restores the NMEA 0183 settings to the
original factory defaults.
Diagnostics: Displays NMEA 0183 diagnostic information.

Configuring NMEA 0183 Output Sentences

You can enable and disable NMEA 0183 output sentences.
1 Select Settings > Communications > NMEA 0183 Setup >
Output Sentences.
2 Select an option.
3
Select one or more NMEA 0183 output sentences, and select
Back.
4
Repeat steps 2 and 3 to enable or disable additional output
sentences.
Setting the Communication Format for Each NMEA 0183
Port
You can configure the communication format for each internal
NMEA 0183 port when connecting your chartplotter to external
NMEA 0183 devices, a computer, or other Garmin devices.
1
Select Settings > Communications > NMEA 0183 Setup >
Port Types.
2
Select an input or output port.
3
Select a format:
• To support the input or output of standard NMEA 0183
data, DSC, and sonar NMEA input support for the DPT,
MTW, and VHW sentences, select NMEA Std..
• To support the input or output of standard NMEA 0183
data for most AIS receivers, select NMEA High Speed.
• To support the input or output of Garmin proprietary data
for interfacing with Garmin software, select Garmin.
53.
53