Garmin 521 用户手册

Using Charts 

Perspective 3D provides a view from above and behind the boat 

(according to your course), and provides a visual navigation aid. 

This view is helpful when navigating tricky shoals, reefs, bridges, or 

channels, and is beneficial when trying to identify entry routes and 

exit routes in unfamiliar harbors or anchorages.

  To access the Perspective 3D screen from the Home screen, 

select 

 > 

.

Press the 

 (+) key to move the view closer to your boat and 

lower to the water. Press the Range (-) key to move the view away 

from the boat.

1.  Use the 

 to point to the navaid. When the cursor is over 

the navaid, the navaid is highlighted.

2.  Press 

 to view details about the navaid.

To access additional settings or options from the Perspective 3D 

screen, select 

waypoints & Tracks—view, add, and configure waypoints and 

tracks.

Tracks—turn tracks on or off (

waypoints—view, sort, or filter existing waypoints, or create 

new ones.
New waypoint—edit, delete, or create a new waypoint.
active Tracks—manage tracks (

).

Saved Tracks—view a list of tracks that have been saved.

Other Vessels—view information about other vessels. To view 

information about other vessels, your unit must be connected to an 

external AIS (Automatic Identification System) or DSC (Digital 

Selective Calling) device.
data bars (

)—show or hide cruising, navigation, fishing, 

fuel, sailing numbers, or compass tape. When on, compass tape 

is displayed at the top of the Perspective 3D screen to provide a 

graphical representation of heading.
Chart appearance—customize the Perspective 3D chart.

Range Rings—toggles the range rings on or off to provide 

distance measurement.
Lane width—adjusts the width of the course line drawn when 

navigating. This setting also affects routes (Route To), but does 

not affect automatic guidance (guide To).