Garmin 3205 Manual Do Proprietário

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PPENDIX

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D

IGITAL

 S

ELECTIVE

 C

ALLING

 (DSC)

The GPSMAP 3205 is capable of receiving WAAS satellite signals. WAAS is 

an FAA (Federal Aviation Administration) funded project to improve the overall 

accuracy and integrity of the GPS signal for aviation use, but land and sea-based 

users can also benefit from this system. There are currently two WAAS satellites 

that can be received in the U.S.A., one over the Atlantic Ocean and one over 

the Pacific Ocean, in a geostationary orbit over the equator. Effective use of the 

WAAS satellite signal may be limited by your geographic location in relation to 

those satellites, now in developmental service. WAAS satellite signal reception 

requires an absolute clear view of the sky and works best when there are no 

nearby obstructions such as buildings or mountains. 
WAAS satellites are numbered 33 or higher when viewing the sky view on your 

GPSMAP 3205. Initial reception of the WAAS signal may take up to 15-20 

minutes, then 1–2 minutes afterwards. When WAAS differential correction has 

been received for GPS satellites (numbers 32 or below), a “D” appears in the 

signal bar of the sky view and “Ready For Navigation with WAAS” appears in 

the Status field. To learn more about the WAAS system, its satellite locations and 

current state of development, visit the FAA web site (

). Because 

WAAS requires CPU resources of the GPSMAP 3205 to search for and track 

the satellites, you can disable the WAAS feature to improve unit performance if 

WAAS reception is not available in your area.

1.  On the 

GPS tab, highlight the Setup sub tab.

2.  Use the 

ROCKER to highlight the WAAS field, and press ENTER.

3.  Highlight 

On or Off, and press ENTER. 

Digital Selective Calling (DSC) uses marine VHF radio and Global Positioning 

System (GPS) technologies to transmit and receive location information. DSC is 

used by mariners to assist them in two major areas: Distress Calls and Position 

Reporting.
A non-emergency DSC Position Report allows mariners to exchange and display 

the positions of one another. When a DSC position is received, the mariner can 

choose to create a waypoint or to show the received position on an electronic 

map. 
An emergency DSC Distress Call allows a vessel in trouble to transmit a 

substantial amount of information in a single transmission or “call,” without 

the need for voice communication. When any nearby rescuer receives the DSC 

signal, an alarm sounds and they immediately receive the position of the caller. 
The rescuer can then choose to navigate (Go To) the callers position to assist or 

forward the call on to the Coast Guard. When the Coast Guard receives the call, 

they can immediately access the callers information (such as who they are and the 

type of vessel) in their database while they are in transit to the callers position.
Any time a vessel receives a DSC call, they can store that location and quickly 

navigate to that position using a Go To. This makes DSC a time-saver, especially 

in an emergency situation. To use DSC, users must first register their VHF radio 

with the FCC and receive a Maritime Mobile Service Identity (MMSI) number.