TABLE OF CONTENTS

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FOREWORD …………………………………………………………… i

IMPORTANT …………………………………………………………… i

EXPLICIT DEFINITIONS ……………………………………………… i

IN CASE OF EMERGENCY…………………………………………… ii

NOTE …………………………………………………………………… ii

RADIO OPERATOR WARNING ……………………………………… iii

TABLE OF CONTENTS ……………………………………………… iv

PRECAUTIONS ………………………………………………………… v

1OPERATING RULES ……………………………………………… 1

2PANEL DESCRIPTION ………………………………………… 2–5

■Front panel ……………………………………………………… 2

■Function display ………………………………………………… 4

■Microphone ……………………………………………………… 5

3BASIC OPERATION…………………………………………… 6–11

■Channel selection ……………………………………………… 6

■Receiving and transmitting ……………………………………… 8

■Call channel programming ……………………………………… 9

■Channel comments …………………………………………… 10

■Microphone Lock function …………………………………… 10

■Display backlight ……………………………………………… 10

■ Optional voice scrambler operation ………………………… 11

4SCAN OPERATION ………………………………………… 12–13

■Scan types ……………………………………………………… 12

■Setting TAG channels ………………………………………… 13

■Starting a scan ………………………………………………… 13

5DUALWATCH/TRI-WATCH ……………………………………… 14

■Description ……………………………………………………… 14

■Operation ……………………………………………………… 14

6DSC OPERATION …………………………………………… 15–49

■MMSI code programming ……………………………………… 15

■MMSI code check ……………………………………………… 16

■DSC address ID ………………………………………………… 17

■Position and time programming ……………………………… 21

■Position and time indication …………………………………… 22

■GPS information indication …………………………………… 22

■Distress call …………………………………………………… 23

■Transmitting DSC calls ………………………………………… 26

■Receiving DSC calls …………………………………………… 41

■Received messages …………………………………………… 45

■DSC Set mode ………………………………………………… 47

7 OTHER FUNCTIONS………………………………………… 50–54

■Intercom operation …………………………………………… 50

■RX Speaker function …………………………………………… 51

■Hailer operation ………………………………………………… 52

■Automatic foghorn function …………………………………… 53

8 SET MODE …………………………………………………… 55–57

■Set mode programming ……………………………………… 55

■Set mode items ………………………………………………… 55

9 CONNECTIONS AND MAINTENANCE …………………… 58–64

■Connections …………………………………………………… 58

■Supplied accessories ………………………………………… 59

■Antenna ………………………………………………………… 59

■Fuse replacement ……………………………………………… 59

■Mounting the transceiver ……………………………………… 60

■MB-75 installation ……………………………………………… 61

■UT-112/UT-98 installation ……………………………………… 62

■HM-162/HM-157 installation ………………………………… 63

10 TROUBLESHOOTING …………………………………………… 67

11 SPECIFICATIONS AND OPTIONS …………………………… 68

■Specifications …………………………………………………… 68

■Options ………………………………………………………… 69

12 CHANNEL LIST ………………………………………………… 70

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Icom IC-M504 instruction manual Table of Contents