176DSC OPERATION Position/Time indicationWhen a GPS receiver (NMEA0183 ver. 2.0 or 3.01) is con-nected, the transceiver displays the current position and time.When no GPS receiver is connected, the transceiver displaysthe manually entered position and time.A GPS receiver appropriate for the IC-M502A is not suppliedfrom Icom. A GPS receiver with NMEA0183 ver. 2.0 or 3.01format is required for position indication. Ask your dealerabout suitable GPS receivers.➥ Push [[DSC/ENTDSC/ENT]] (( )) for 1 sec. to display the current po-sition and time.• “MNL” (manual) appears instead of the “GPS” indication whenno GPS is connected and the position/time data is entered man-ually.➥ When connecting GPS receiver is compatible severalsentence formatteres, the order of input precedence is‘RMC,’ ‘GGA,’ ‘GNS’ and ‘GLL.’➥ When sentence formatter ‘RMC’ is received, time indi-cation includes a date, and UTC time only.➥ “??” may blink instead of position and time indicationswhen the GPS data is invalid, or has not been manuallyupdated after 4 hours.34°34.123N135°34.123EJUL17 11:47CALLING34°34.123N135°34.123EGPS UTC11:47CALLING34°34.123N135°34.123EGPS LOC01:47CALLING• Sentence formatter ‘RMC’• Sentence formatteres ‘GGA,’ ‘GNS,’ ‘GLL’No offset time Offset time is–10 hours. (p.34)34°34.123N135°34.123EGPS UTC12:34CALLINGPOS6

OPERATING RULES

I Front panel

panel description 2

I Function display

PANEL DESCRIPTION........... 2

I Channel selection

basic operation

I Receiving and transmitting

I Call channel programming

BASIC OPERATION ............ 6

DUALWATCH/TRI-WATCH

I Scan types

I Setting tag channels

I MMSI code programming

dsc operation

I Position and Time programming

I Position/Time indication

I Distress call

I Transmitting DSC calls

I Receiving DSC calls

I Received messages

dsc set mode

I Intercom operation

I Microphone lock function

I Set mode programming

I Set mode items

set mode

I Supplied accessories

I Connections

I Mounting the transceiver

I Optional unit installation

I Dimensions

troubleshooting

CHANNEL LIST

SPECIFICATIONS AND 5

I Options

I Panel description

I Lock functions

I RF attenuator function

I Dualwatch/Tri-watch operation

I Starting a scan

I Channel comments

I HM-127 supplied accessories

I Installation

Icom IC-M502A Instruction Manual

IC-M502A