Garmin gmr 21-41 User Manual

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Before transmission begins, the message “Spinning Up” is shown 

while the radar antenna reaches nominal rotation speed. After the 

message disappears, the radar begins painting an image. 

The Radar Page shows a status bar along the top, user-configurable 

digital navigation data down the right side, a Heading Line, and 

Range Rings. Soft keys that allow quick access to radar functions and 

setting changes appear along the bottom of the page.

Use the Range Rings to quickly determine the distance to a target. 

The lower-right corner of the screen contains two scales. The scale 

value represents the distance from the center of the radar display to 

the outermost complete ring. The top scale represents this value. The 

bottom scale represents the ring separation or the distance between 

the Range Rings. Use the RANGE keys to zoom in or out. The tick 

marks on the Range Rings are arranged with major tick marks at 30 

degree increments and minor tick marks every five degrees. The tick 

marks can help in quickly determining the azimuth to a target.

The Heading Line is shown from your current position along the path 

of your current heading.