Garmin 521 User Manual

Using Charts 

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

new ones.
New waypoint—create and edit 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 

data bars (

).

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).

A BlueChart g2 Vision SD card offers Mariner’s Eye 3D that 

provides a detailed three-dimensional view from above and behind 

the boat (according to your course), and provides a visual navigation 

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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.

  Press the 

key to move the view closer to your boat 

and lower to the water. Press the 

 key to move the view 

away from the boat. The scale (

) temporarily appears at 

the bottom of the screen.