Garmin gmr 20 Manuel D’Utilisation

GMR 20/40 O

PERATION

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Front of Boat Offset—this setting is used to correct for any 

alignment error that may have occurred during installation of the 

scanner. The scanner is directional. For optimal performance it needs 

to be pointed directly ahead of the boat. To verify that the scanner 

is properly aligned, point the bow of the boat directly at a stationary 

object such as a buoy. Check the radar screen to verify that the object 

is shown directly ahead of the boat. If it is not, highlight the slider and 

move it left or right using the ARROW KEYPAD until the object is 

displayed directly in front of the boat. When you are satisfied with the 

alignment, press the ENTER key to accept the change.
Timed Transmit—is used to save power, likely while at anchor. 

When Timed Transmit is 

On, the radar refers to the settings in Timed 

Transmit XMIT Time and Timed Transmit STBY Time. If Off is 

selected, the Timed Transmit XMIT Time and Timed Transmit STBY 

Time fields are inactive. 
Timed Transmit XMIT Time—this setting determines a time 

interval in minutes the radar transmits. For example, if set to 01min, 

the radar transmits for a period of one minute before referring to the 

Timed Transmit STBY Time. 

Timed Transmit STBY Time—this setting determines a time 

interval in minutes that the radar is in stands by. For example, if set to 

10min, the radar stands by for a period of ten minutes before referring 

to the Timed Transmit XMIT Time. When the radar is standing by, the 

scanner does not rotate or transmit; however power is still applied to 

the Magnetron, eliminating the need for a warm-up cycle.  

The Display tab contains settings for: Center Offset, Rings, 

Background color, Heading Line, Bearing Reference, and Navigation 

Features.