Uniden UM425 VHF DSC 사용자 설명서

Suppose you are coordinating safety for a sailboat race. Before the race 

starts, you instruct all the racers to enter your group MMSI number into their 

radios. During the race:
• 

Throughout the race, you use group calling to update the racers on the 

time, race status, and any course corrections.

• 

A power boat full of spectators comes a little too close to the race path. 

You use individual calling to contact the power boat and advise them to 

stay clear of the race.

• 

You see a rowboat entering the area, but since it doesn’t have a radio, 

you can’t communicate with the rowboat. You use all ships calling to 

alert all the other boats in the area of the possible danger. 

To call a single station with DSC, follow the steps below:

Press the 

1. 

 button to display the menu.

Choose the 

2. 

DSC Call sub-menu, then select Individual.

The radio displays the names listed in your directory; use 

3. 

 

and 

 buttons to highlight the directory entry you want to 

call and press the 

button.

 

If you want to call a station that is not in your directory, select Manual. 

The radio prompts you to enter the MMSI number you want to call. 

Enter the MMSI number the same way you enter directory entries (see 

page 27) Enter all nine digits and press the 

button.

The radio prompts you to select a response channel. Use 

4. 

 

and 

 buttons to scroll through the available channels. 

When you reach the channel you want to use for a response, press the 

button.

The radio displays the MMSI number you are about to call and asks 

5. 

you to confirm. If you want to call the displayed MMSI number, select 

Send. To cancel the call, select Cancel.
The radio automatically switches to channel 70 to transmit the call 

6. 

request.

UM425 VHF OM.indd   30

28/9/11   11:55:17 AM