Garmin 190-00683-00 Manuale Utente

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Understanding Distress Calls
With your GPSMAP 378/478 properly connected to a VHF radio 
with DSC output, you can receive any DSC distress call within 
range. An alert message appears and a tone sounds when a distress 
call is received. The alarm only sounds on a distress call; position 
reports do not sound the alarm. Distress calls are broadcast to 
all DSC users in radio range and appear with a blue and white 
checkered icon on the DSC Call List and Log tabs.
You can enter a caller’s name, if it is known. The caller’s name 
replaces the MMSI number as a reference once entered.
Understanding Position Reports
The Position Report operates similarly to the distress call. This type 
of contact is like a phone call; no emergency alarms are set off. 
Position reports are not broadcast to all DSC users and appear with a 
gold boat icon. 
Receiving DSC Calls
Each time you receive a distress call or position report, a review 
page opens—either a DSC Position Report Page or a Distress Call 
Page. Both pages contain identical fields to the DSC Entry Review 
Page. 
Each entry in the Call List and Log has a corresponding DSC Entry 
Review Page. This page operates similarly to the Distress Page and 
Position Report Page. From the DSC Entry Review, you can Delete 
the entry, Save it as a waypoint, or show the location on the map.
To review a call or log entry:
1.  Open the Call List or Log from the
DSC tab.
2.  Highlight the call you want to review.
3.  Press
ENTER to open the DSC Entry Review Page.
DSC Entry Review Page
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GPSMAP 378/478 Owner’s Manual
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