Uniden UM-525 Care and Maintenance, Frequently Asked Questions, Receiving a DSC Distress Call

35°40.610N

139°46.564E

685749638

DISTRESS

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 the16 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.

DISTRESS

123456789 16 NO POSITION

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

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, TX appears on the display and other vessels hear 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 41