Uniden UM425 VHF DSC 사용자 설명서

Lift the red cover. Press and hold the 

DISTRESS 

button for three seconds. The UM425 transmits your 

boat’s location every few minutes until you receive a 

response.
NOTE: If the radio displays ENTER USER MMSI, 

Lift the red cover 

and press the 

 button.

Make sure your radio is on. 

1. 

On the microphone, press the 

2. 

16/9-TRI button to switch to Channel 16 (156.8 

MHz). (If the corner of the display does not show 16, press the 

16/9-TRI button 

again until it does.)

Press the 

3. 

PUSH TO TALK button on the microphone and say: 

"

MAYDAY --MAYDAY-- MAYDAY." 

Say "

4. 

THIS IS {name or call sign of your boat}."

Say "

5. 

MAYDAY {name or call sign of your boat}."

Tell where you are: (what navigational aids or landmarks are near, or read the 

6. 

latitude and longitude from your GPS). 

State the nature of your distress, e.g. are you sinking, medical emergency, man 

7. 

overboard, on fire, adrift, etc.

Give number of persons aboard and conditions of any injured persons. 

8. 

Estimate present seaworthiness of your ship, e.g. how immediate is the danger 

9. 

due to flooding or fire or proximity to shore.

Briefly describe your ship (length, type, color, hull). 

10. 

Say: "

11. 

I WILL BE LISTENING ON CHANNEL 16." 

End message by saying "

12. 

THIS IS {name or call sign of your boat}, OVER." 

Release the 

13. 

PUSH TO TALK button and listen. 

For future reference, write your boat’s name & call sign here:

UM425 VHF OM.indd   2

28/9/11   11:55:11 AM