Garmin gmr 404 用户手册

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•  North Indicator—toggles the north indicator arrow on or off.
•  timed transmit—used to save power, usually while at anchor. 

When Timed Transmit is On, the radar uses the settings in 

timed transmit XMIt time and timed transmit StBY 

time fields. When Timed Transmit is Off, these fields are 

unavailable. 

•  timed transmit XMIt time—sets the amount of time (in 

minutes) for which the radar transmits. For example, if set to 

01 min, the radar transmits for one minute before switching to 

standby for the amount of time entered in the timed transmit 

StBY time field. 

•  timed transmit StBY time—sets the amount of time (in 

minutes) that the radar is in standby mode. For example, if set 

to 10 min, the radar is in standby mode for 10 minutes before 

switching to transmission for the amount of time entered in 

the timed transmit XMIt time field. When the radar is in 

standby mode, the scanner does not rotate or transmit; however, 

power is still applied to the Magnetron, eliminating the need 

for a warm-up cycle. 

•  Cross-talk Rejection—toggles cross-talk rejection on or off. 

Radar cross-talk may occur when two or more radar equipped 

vessels are operating in proximity to one another. Cross-talk 

rejection automatically filters out the cross-talk interference.

Use the Display sub tab to adjust settings for: Center Offset, Rings, 

Background color, Heading Line, Bearing Reference, and Navigation 

Features. 

The available Display sub tab options are:

• 

Center Offset—sets your location on the screen. Center 

places your current location in the center of the screen. Look 

Ahead shifts your current location toward the bottom of the 

screen, allowing you to view an area farther ahead. Auto Shift 

adjusts your location on the screen according to the current 

speed.