Garmin GPSMAP 546s - Manual (Page 53)

Configuring the Chartplotter
GPSMAP 400/500 Series Owner’s Manual 47
Map datum—change the coordinate system in which the map is structured.
Do not change the map datum unless you are using a map or chart that
specifies a different map datum.
Time—set the time options.
• Time format—select 12-hour, 24-hour, or UTC time format.
• Time Zone—set the time zone you want displayed for time readings. If
auto is selected for the Time Zone, the DST option is not available and is
automatically set to auto.
• dST (Daylight Saving Time)—select Off, On, or auto. The auto setting
automatically turns daylight saving time on or off, depending on the time
of year.
• baro. Ref. Time—specify the reference time (from 30 minutes to 24
hours) used to calculate the barometric pressure trend. The trend is
displayed on the wind gauge when ground wind is selected ( page 35 ) or on
the Cruising data bar ( page 9 ).
Changing the System Language
To change the system language, from the Home screen, select Configure >
Preferences > Language. Select the language.
Configuring navigation Preferences
To change navigation preferences, from the Home screen, select Configure
> Preferences > Navigation.
Route Labels—for saved routes, this determines whether route turns are
indicated by number (Turn 1, Turn 2, and so on) or by waypoint name, or
whether the description of turns is hidden.
Turn Transition—set how much time or how far before a turn in a route that
you transition to the next leg.
Speed Sources—specify the sensor used for wind numbers and fuel economy.
Select wind or fuel Economy to toggle between water (from a water-speed
sensor) and GPS (from the calculated GPS speed).
auto guidance—set the automatic guidance parameters:
• Safe depth—set the minimum depth (chart depth datum) to allow when
calculating an automatic guidance path. A safe depth of less than one meter
is not allowed when using automatic guidance.
• Safe Height—set the minimum height (chart height datum) of a bridge that
your boat can safely travel under.
• Shoreline distance—set the safe distance for your boat from the shore:
Nearest, Near, Normal, far, or farthest.
Shoreline Distance Auto guidance Setting
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 (Nearest, Near,
Normal, far, or farthest) are relative, not absolute. To ensure that the auto-
guidance line is placed an 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.