Receiving A Dsc Distress Call; Care And Maintenance; Frequently Asked Questions - Uniden UM-525 Owner's Manual

The radio sends the distress call and sounds a distress tone. Then, the radio tunes to
Channel 16 and Channel 70 and waits between 3 minutes and 30 seconds (210 seconds)
and 4 minutes and 30 seconds (270 seconds) for an acknowledgement signal. The radio
continues to sound the alarm and listen for an acknowledgement signal until it receives one.

Receiving a DSC Distress Call

If the radio receives a DSC distress call, you see a screen similar to the
following, and the radio sounds a distress tone. If the name of the
vessel sending the distress call is programmed into the radio, the
vessel's name appears. Otherwise, the vessel's MMSI, position, time,
and nature code appear. Rotate PUSH/SELECT while a distress call is being received to
display additional information about the distress call.
If the sending radio does not send position and nature code
information with its distress call, you see a screen similar to the
following.

Care and Maintenance

Your UM-525 Marine Radio is a precision electronic instrument and you should treat it
accordingly. Due to its rugged design, very little maintenance is required. However, a few
precautions should be observed.
• If the antenna has been damaged, you should not transmit except in the case of an
emergency. A defective antenna may cause damage to your radio.
• You are responsible for continued FCC technical compliance of your radio.
• You are urged to arrange for periodic performance checks with your Uniden Marine
dealer.

Frequently Asked Questions

Frequently Asked Questions
Q: The radio will not turn on. What should I do?
A: Check the battery or power source. Make sure the radio is receiving at least 13.8 volts.
Q: When I press PTT on the microphone,
a click, but they cannot hear me speak. What's wrong?
A: The microphone might have a bad element. Contact your Uniden marine dealer for more
information.
Q: The radio always stops on one particular channel even though I didn't select it. Why?
A: There might be a source of noise near that channel's frequency. Choose another
frequency.
Q: The radio is receiving noise on a channel and I cannot eliminate it using the squelch.
What's wrong?
A: An external source might be generating noise on that frequency. Turn off the offending
device or choose another frequency.
Care and Maintenance
Care and Maintenance
appears on the display and other vessels hear
TX
DISTRESS
16
685749638
35°40.610N
139°46.564E
DISTRESS
16
123456789
NO POSITION
41