Garmin 420 사용자 매뉴얼

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To configure settings for boats other than your own, from the Home

screen, select 

 > 

.

AIS—turn AIS (Automatic Identification System) on or off. AIS

alerts you to area traffic by providing boat IDs, position, course, and

speed for boats equipped with a transponder within range.
DSC—turn DSC (Digital Selective Calling) on or off.

  NOTE: To configure AIS or DSC information for other boats,

your unit must be connected to an external AIS or DSC device. 

Safe Zone—turn a safe zone around your boat on or off. This is 

used for collision avoidance, and can be customized:

• 

Ring—show or hide a ring on the map showing the safe zone 

for your boat.

•  Range—change the measured radius of the safe zone ring to a 

specified distance from 0.1 to 2.0 nm (or .02 to 5.0 km, or 0.1

to 2.0 mi).

•  Time to—sounds an alarm if AIS determines that a target 

will intersect the Safe Zone within the defined time interval

(ranging from 3 to 24 minutes).

To configure XM audio, from the Home screen, select

 > 

. You can delete a preset channel, select a category,  enter 

a specific channel, and adjust the volume level.

  NOTE: XM Radio is available only on GPSMAP 430x and 

440x units. You must plug the optional GXM 31 antenna into the 

XM port on the back of the unit, and have a subscription to XM 

Radio to use XM audio features. For more information, see the 

GXM 31 Owner’s Manual.