Garmin 640 Guida Utente

Marine Mode: Advanced Configuration

aiS alarm (aiS only)—set an alarm to sound when other AIS-

equipped vessels are within a specified range. This is used for 

collision avoidance and can be customized.

range—change the measured radius of the Safe Zone ring to a 

specified distance from 500 ft. to 2.0 nm (or 150 m to 3 km, or 

500 ft. to 2.0 mi.).
time to (Safe Zone)—sounds an alarm if AIS determines that 

a target will intersect the Safe Zone within the defined time 

interval (ranging from 1 to 24 minutes).

  Note: Additional AIS and DSC configuration options are 

available from the Navigation chart options. See 

From the Home screen, touch 

 > 

.

  Note: You must connect the optional GXM 40 XM receiver and 

have a subscription to XM Radio to use XM Radio features. For 

Volume Slider—adjust the XM volume level.
Volume—show the volume level as a percentage. Touch 

to 

mute the XM Radio.

Channel guide—select the specific XM channel within the 

currently selected category.
Channel entry—enter a channel using the on-screen keyboard.
Category—select the category of channels that are displayed in the 

Channel Guide.
Save preset—save the current XM channel in the Presets list. 

Touch Delete Preset to remove the current channel from the list. 

Presets is displayed as a category in the category list.

From the Navigation chart, touch 

.

Waypoint and tracks—access shortcuts to waypoint and track 

information. For more information on waypoints and tracks, 

see 

.

tracks—toggle tracks on or off.
Waypoints List—view a list of all saved waypoints.
New Waypoint—mark a new waypoint.
active track—change active track options, clear the active 

track, follow the active track, or save the active track.
Saved tracks—view the saved tracks list.