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90 GPSMAP 3206/3210 Owner’s Manual
usIng radar > understandIng radar
radar
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.
Understanding the Radar Display
The Radar Page shows a status bar along the top, user-congurable 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.
Range
rings
Heading line
Zoom scale
Ring separation
Soft
keys
Using Range Rings
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 one end of the scale bar to the other. The top scale is the current
zoom scale. Use the RANGE keys to zoom in or out. The bottom scale represents
the ring separation or the distance between the Range Rings. The tick marks on
the Range Rings are arranged with major tick marks at 30 degree increments
and minor tick marks every ve degrees. The tick marks can help in quickly
determining the azimuth to a target.
3/4 nm
1/2 nm
1/4 nm
Heading Line
The Heading Line is shown from your current position along the path of your
current heading.