Garmin 521 User Manual

Using Charts

Spot depths—turns spot soundings on or off and sets a dangerous 

depth.
Safety Shading—identifies a selected depth. Areas with depths 

shallower than the specified value are shaded in blue while areas 

with depths greater than the specified value are shaded in white.  The 

shading is always drawn at, or deeper than, the selected depth.
Symbols—changes symbol preferences.

Navaid Size—adjusts the size of the navaid symbols shown on 

the map.
Navaid Type—selects the navaid symbol set (NOAA or IALA).
Land POis—turns the display of land POIs (points of interest) 

on or off.
Light Sectors—turns the sector in which a navigational light is 

visible on or off. Selecting On filters out light sectors depending 

on the zoom level.
Chart borders—turns chart borders on when using a BlueChart 

g2 Vision SD card and you want to see what area the maps cover.
Photo Points—turns camera icons (

) on or off when 

using a BlueChart g2 Vision SD card.

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Use the Split Navigation chart to view two different zoom levels of 

the Navigation chart at the same time.

The top half of the screen is zoomed in 10 times closer than the 

bottom half of the screen. The Range (-/+) keys control the zoom 

level.
Press 

 to view additional settings (

page 9)

.