Garmin 521s 用户手册

Configuring the Chartplotter

Heading—sets the reference used in calculating heading 

information.

auto Magnetic—automatically sets the magnetic declination for 

your location.
True—sets true north as the heading reference.
grid—sets grid north as the heading reference (000º).
User Magnetic—allows you to set the magnetic variation value.

Position format—change the coordinate style in which a given 

location reading appears. Do not change the position format unless 

you are using a map or chart that specifies a different position 

format.
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.
dST (Daylight Saving Time)—select 

, 

, or 

. The 

auto setting automatically turns daylight saving time on or off, 

depending on the time of year.

  To change the system language, from the Home screen, select 

 > 

 > 

 and then select the 

language.

  To change navigation preferences, from the Home screen, select 

 > 

 > 

.

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 

 or 

 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.