Icom IC-M423G Instruction Manual
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Icom IC-M423G Instruction Manual

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INSTRUCTION MANUAL
VHF MARINE TRANSCEIVERS
|M423
|M423G
|M423GE
|M424
|M424G
This device complies with Part 15 of the FCC
Rules. Operation is subject to the condition that
this device does not cause harmful interference.
IC-M423G

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Summary of Contents for Icom IC-M423G

  • Page 1 INSTRUCTION MANUAL VHF MARINE TRANSCEIVERS |M423 |M423G |M423GE |M424 |M424G This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. IC-M423G...

  • Page 2: Important

    READ ALL INSTRUCTIONS Thank you for choosing this Icom product. carefully and completely This product is designed and built with Icom’s state of the art before using the transceiver. technology and craftsmanship. With proper care, this product SAVE THIS INSTRUCTION MANUAL should provide you with years of trouble-free operation.

  • Page 3: In Case Of Emergency

    • After the acknowledgement is received, Channel 16 is auto- matically selected. Icom, Icom Inc. and Icom logo are registered trademarks of Icom Incorporated 3. Hold down [PTT], then transmit the appropriate informa- (Japan) in Japan, the United States, the United Kingdom, Germany, France, Spain, Russia, Australia, New Zealand, and/or other countries.

  • Page 4: Radio Operator Warning

    RADIO OPERATOR WARNING FAILURE TO OBSERVE THESE LIMITS MAY ALLOW Icom requires the radio operator to meet the THOSE WITHIN THE MPE RADIUS TO EXPERIENCE RF FCC Requirements for Radio Frequency Expo- RADIATION ABSORPTION WHICH EXCEEDS THE FCC sure. An omnidirectional antenna with gain not MAXIMUM PERMISSIBLE EXPOSURE (MPE) LIMIT.

  • Page 5: Avertissement Pour Les Opérateurs Radio

    AVERTISSEMENT POUR LES OPÉRATEURS RADIO LE NON-RESPECT DE CES LIMITES PEUT CAUSER, POUR LES Icom exige que l’opérateur radio se conforme aux PERSONNES SITUÉES DANS LE RAYON D’EXPOSITION MAXI- exigences de la FCC en matière d’exposition aux MALE ADMISSIBLE, UNE ABSORPTION DE RAYONNEMENT radiofréquences.

  • Page 6: Fcc Information

    FCC INFORMATION MISE EN GARDE: Tout changement ou modification, non expressé- ment approuvé par Icom Inc., peut annuler l’autorisation de l’utilisateur à utiliser cet appareil conformément à la réglementation FCC. This equipment has been tested and found to comply with the...

  • Page 7: Precautions

    PRECAUTIONS RWARNING! NEVER DO NOT connect the transceiver to an AC use harsh solvents such as benzine or alcohol to outlet. This may pose a fire hazard or result in an electric shock. clean the transceiver, as they will damage the transceiver’s surfaces.

  • Page 8: Précautions

    PRÉCAUTIONS RAVERTISSEMENT! NE JAMAIS MAINTENIR connecter l’emetteur- l'émetteur-récepteur et le microphone à au recepteur a une alimentation CA au risque de provoquer un in- moins 1 mètre du compas de route magnétique du navire. cendie ou un choc electrique. NE PAS utiliser ou placer l’émetteur-récepteur dans des RAVERTISSEMENT! NE JAMAIS brancher l'émetteur-...

  • Page 9: Table Of Contents

    TABLE OF CONTENTS PREFACE ................i 4 BASIC OPERATION ..........11–18 IMPORTANT ................i ■ Selecting a Channel ...........11 EXPLICIT DEFINITIONS ............i ■ Receiving and transmitting .........14 IN CASE OF EMERGENCY ..........ii ■ Adjusting the volume and squelch levels ....15 INSTALLATION NOTE ............
  • Page 10 TABLE OF CONTENTS (continued) 7 DSC OPERATION ...........22–70 10 CONNECTIONS AND MAINTENANCE ....84–90 ■ DSC address ID ............22 ■ Connections ...............84 ■ Antenna ..............86 ■ Entering position and time .........25 ■ Making a Distress call ..........26 ■ Fuse replacement ............86 ■...

  • Page 11: Operating Rules

    OPERATING RULES D Priorities (2) OPERATOR’S LICENSE A Restricted Radiotelephone Operator Permit is the license • Read all rules and regulations pertaining to call priorities, most often held by small vessel radio operators when a radio and keep an up-to-date copy handy. Safety and distress is not required for safety purposes.

  • Page 12: Panel Description

    PANEL DESCRIPTION ■ Front panel Speaker Function display (p. 5) r UP AND DOWN/CHANNEL SELECT KEYS [∫•CH]/[√•CH] ➥ Push to select the operating channels, Menu items, Menu settings, and so on. (pp. 14, 74) ➥ While scanning, push to check Favorite channels, change the scanning direction or manually resume a scan.
  • Page 13 ]* (p. 11) onds to enter Call channel entry mode. (p. 16) Push to select a regular channel. * For only the IC-M423, IC-M423G, and IC-M423GE except for o SOFTKEYS Australian version transceivers. Desired functions as described below can be assigned in the Menu screen.
  • Page 14 PANEL DESCRIPTION ■ Front panel (Continued) Backlight [ ] (p. 18) Push to enter the LCD and key backlight brightness ad- Speaker Function display (p. 5) justment mode. • While in the adjustment mode, push [∫]/[√]/[Ω]/[≈] or rotate Dial to adjust the brightness of the LCD and key backlight. Log [ ] (p.

  • Page 15: Function Display

    ➥ “1W” is displayed when low power is selected. nal GPS receiver is receiving valid position data. e RX SPEAKER ICON (p. 72) *For only IC-M423G, IC-M423GE, and IC-M424G. Displayed while in the RX Speaker mode. ➥ Blinks when searching for valid position data.
  • Page 16 PANEL DESCRIPTION ■ Function display (Continued) !5 KEY ICON (p. 7) Shows the preset function of the softkeys on the front panel. !6 TIME ZONE INDICATOR ➥ Shows the current time when GPS data is received, or the time is manually entered. •...

  • Page 17: Softkey Function

    PANEL DESCRIPTION ■ Softkey function !7 POSITION INDICATOR Various functions can be assigned to the softkeys. When a ➥ ➥ S hows the current position when position data is re- key function is assigned, the key icon is displayed above the ➥...

  • Page 18: Speaker Microphone

    ➥ Push to select Channel 16. (p. 11) ➥ Hold down for 1 second to select the Call channel. (p. 11) • The “CALL” icon is displayed when the Call channel is se- lected. *For only the IC-M423G, IC-M423GE, and IC-M424G. IC-M423G/IC-M423GE IC-M423/IC-M424 /IC-M424G q PTT [PTT] Hold down to transmit, release to receive.

  • Page 19: Preparation

    PREPARATION ■ Entering the MMSI code The 9 digit MMSI (Maritime Mobile Service Identity: DSC self r Repeat step e to enter all 9 digits. ID) code can be entered at power ON. t After entering the 9 digit code, “FINISH” is automatically selected, and then push [ENT] or Dial to set it.

  • Page 20: Entering The Atis Code (For Dutch And German Version Transceivers)

    PREPARATION ■ Entering the ATIS code (For Dutch and German* version transceivers) The 10 digit ATIS (Automatic Transmitter Identification Sys- r Repeat step e to enter all 10 digits. tem) code can be entered at power ON. t After entering the 10 digit code, “FINISH” is automatically selected, and then push [ENT] or Dial to set it.

  • Page 21: Basic Operation

    BASIC OPERATION ■ Selecting a Channel D Channel 16 D Call channel Channel 16 is the distress and safety channel. It is used for Each regular channel group has a separate leisure use Call establishing initial contact with a station and for emergency channel.
  • Page 22 BASIC OPERATION ■ Selecting a Channel (Continued) D Selecting the Channel group r Rotate Dial or push [∫]/[√] to select the desired channel There are preset international channels in the IC-M423/IC- group, and then push [ENT]. M423G/IC-M423GE/IC-M424/IC-M424G. Except for the Eu- •...
  • Page 23 BASIC OPERATION D Selecting a Weather channel The Weather channel list (For only USA and Australian version transceivers) Frequency (MHz) The transceiver has 10 weather channels. These are used for WX channel Transmit Receive monitoring broadcasts from NOAA. (National Oceanographic RX only 162.550 and Atmospheric Administration)

  • Page 24: Receiving And Transmitting

    BASIC OPERATION ■ Receiving and transmitting CAUTION: DO NOT transmit without an antenna. u Hold down [PTT] to transmit, then speak at your normal voice level. q Hold down [PWR](Dial) to turn ON the power. • “ ” is displayed. •...

  • Page 25: Adjusting The Volume And Squelch Levels

    Push [ENT] to set the level, and exit the volume adjust- Microphone Microphone ment mode. • Push [CLEAR] to cancel. The desired function can be assigned to Dial. See page 79 IC-M423G/IC-M423GE IC-M423/IC-M424 for details. /IC-M424G...

  • Page 26: Entering A Call Channel Data

    BASIC OPERATION ■ Entering a Call channel data ■ Entering a Channel name You can enter data in Call channel in each channel group for Enter a name of up to 10 characters. Capital letters, 0 to 9, some symbols, (! " # $ % & ' ( ) * + , – . quick recall.

  • Page 27: Microphone Lock Function

    This prevents accidental channel changes and function ac- cess. For only the IC-M423G, IC-M423GE, and IC-M424G. [HI/LO] is printed for the IC-M423 and IC-M424. ➥ While holding down [H/L] or [HI/LO] on the microphone, hold down [PWR](Dial) to turn ON the transceiver and turn t Push [Ω]/[≈]/[∫]/[√] to select “FINISH,”...

  • Page 28: Adjusting The Backlight Level

    BASIC OPERATION ■ Adjusting the Backlight level ■ Using the AquaQuake water draining function The function display and keys can be backlit for better visibil- ity under low light conditions. The AquaQuake water draining function clears water away The backlight is adjustable in 7 levels and OFF. from the speaker grill.

  • Page 29: Scan Operation

    SCAN OPERATION ■ Scan types Scanning is an efficient way to locate signals quickly over a Set the Favorite channels (scanned channel) before scan- wide frequency range. The transceiver has a Priority scan ning. Clear the Favorite channels which inconveniently stop and a Normal scan.

  • Page 30: Setting Favorite Channels

    SCAN OPERATION ■ Setting Favorite channels ■ Starting a scan For more efficient scanning, add desired channels as Favor- First, set the scan type (Priority or Normal scan) and scan ite channels, or clear the Favorite on unwanted channels. resume timer in the Menu screen. (p. 76) Channels that are not tagged will be skipped while scanning.

  • Page 31: Dualwatch/Tri-Watch

    DUALWATCH/TRI-WATCH ■ Description ■ Operation Dualwatch monitors Channel 16 while you are receiving q Select Dualwatch or Tri-watch in the Menu screen. (p. 76) on another channel; Tri-watch monitors Channel 16 and the w Push [Y]/[Z] to select the desired operating channel. Call channel while receiving another channel.

  • Page 32: Dsc Operation

    DSC OPERATION ■ DSC address ID D Entering an Individual ID A total of 100 DSC address IDs can be entered and assigned t After entering the 9 digit code, push [ENT] or Dial to set it. a name of up to 10 characters. •The ID name entry screen is displayed.
  • Page 33 DSC OPERATION D Entering a Group ID t After entering the 9 digit code, push [ENT] or Dial to set it. q Enter “GROUP ID” in the DSC SETTINGS menu. • Group ID name entry screen is displayed. ➪ DSC Settings ➪...
  • Page 34 DSC OPERATION ■ DSC address ID (Continued) D Deleting Individual and Group IDs e Push [OK] to delete the ID, and return to the “INDIVIDUAL q Enter “INDIVIDUAL ID” or “GROUP ID” in the DSC SET- ID” or “GROUP ID” list screen. TINGS menu.

  • Page 35: Entering Position And Time

    They are automatically included when a GPS receiver compatible with the NMEA 0183 (ver. 2.0 or later) format is connected. *For only the IC-M423G, IC-M423GE, and IC-M424G. • Manual entry is disabled when a GPS receiver is con- nected.

  • Page 36: Making A Distress Call

    DSC OPERATION ■ Making a Distress call A Distress call should be made if, in the opinion of the Master, w After transmitting the call, the transceiver waits for an ac- that the ship or a person is in distress and requires immediate knowledgment call.
  • Page 37 DSC OPERATION D Making a Regular call The nature of the Distress call should be included in the Dis- e The Distress call confirmation screen is displayed. tress call. • Rotate Dial or push [Y]/[Z] to see the hidden lines. q Enter “DISTRESS CALL”...
  • Page 38 UTC time as follows: mode), or DSC cancel call is made. (p. 29) *For only the IC-M423G, IC-M423GE, and IC-M424G. • Push [RESEND] to manually transmit the Distress repeat call. • Push [Ω]/[≈] then push [INFO] to display the transmitted Dis- tress call information.
  • Page 39 DSC OPERATION D Canceling a Distress call r The Distress cancel call is transmitted. q While waiting for an acknowledgment call, push [CAN- CEL]. t Channel 16 is automatically selected. • Report your situation using the microphone. w Push [CONTINUE]. •...
  • Page 40 DSC OPERATION D Making a Distress Relay Acknowledgement (For only USA version transceivers) About Received call information: When receiving a Distress Relay Call, you can transmit an • Push [IGN] to ignore the call and return to the normal operating ac knowledgement, as shown below.
  • Page 41 DSC OPERATION r The Distress Relay Acknowledgement confirmation screen y Channel 16 is automatically selected. is displayed. • Push [EXIT] to return to the normal operating mode.* *The exit confirmation dialog (p. 29) is displayed. Push [CALL] to transmit the acknowledgement call. •...

  • Page 42: Making Dsc Calls

    DSC OPERATION ■ Making DSC calls To ensure correct operation of the DSC function, make About Manual Entry: sure you correctly set the CH70 SQL LEVEL. (p. 67) Enter a desired individual ID in the following way: • Select a desired number using Dial, or [Ω]/[≈]. D Making an individual call •...
  • Page 43 DSC OPERATION y Standby on Channel 70 until an acknowledgement is received. e Select a desired intership channel using Dial or [Y]/[Z], then push [ENT]. • Push [EXIT] to return to the normal operating mode.* * Only USA version, the exit confirmation dialog (p. 29) is displayed. •...
  • Page 44 DSC OPERATION ■ Making DSC calls D Making an Individual Acknowledgement D Making an Individual call (continued) Or, when the acknowledgement ‘Unable to comply’ is re- When you receive an Individual call, you can make an ac- ceived, alarm sounds and the screen below is displayed. knowledgement (‘Able to Comply,’...
  • Page 45 DSC OPERATION e Select one of three options, then push [ENT]. r The Individual ACK confirmation screen is displayed. • Push [EXIT] to return to the normal operating mode. Push [CALL] to make an acknowledgement call. • Push [BACK] to return to the previous screen. t The screens shown below are displayed.
  • Page 46 DSC OPERATION D Making a Group call ■ Making DSC calls The Group call function allows you to make a DSC signal to D Making an Individual Acknowledgement (continued) only a specific group. Manual ACK: q Enter “INDIVIDUAL ACK” in the DSC CALLS menu. q Enter “GROUP CALL”...
  • Page 47 DSC OPERATION r A confirmation screen is displayed. e Select a desired intership channel using Dial or [Y]/[Z], then push [ENT]. • Confirm the call contents. • Intership channels are already preset into the transceiver in the recommended order. t Push [CALL] to make a Group call. •...
  • Page 48 DSC OPERATION r A confirmation screen is displayed. ■ Making DSC calls (Continued) D Making an All Ships call • Confirm the call contents. All ships that have DSC transceiver use Channel 70 as their ‘listening channel.’ When you want to announce a message to these ships, use the ‘All Ships Call’...
  • Page 49 DSC OPERATION D Making a Position Request Call About Manual Entry: Enter a desired individual ID in the following way: (For only USA and Australian version transceivers) • Select a desired number using Dial, or [Y]/[Z]/[Ω]/[≈]. Make a Position Request Call when you want to know a spe- •...
  • Page 50 DSC OPERATION ■ Making DSC calls D Making a Position Request call (continued) u Push [ALARM OFF] to stop the alarm, and then the screen r Push [CALL] to make a Position Request Call. as shown below is displayed. • If Channel 70 is busy, the transceiver stands by until the channel becomes clear.
  • Page 51 DSC OPERATION D Making a Position Report Call (For only USA and Australian version transceivers) About Manual Entry: Make a Position Report Call when you want to announce your Enter a desired individual ID in the following way: own position to a specific ship and receive an answer back. •...
  • Page 52 Edit your latitude and longitude position and UTC time as follows: *For only the IC-M423G, IC-M423GE, and IC-M424G. t After the Position Report Call has been transmitted, the transceiver automatically returns to the normal operating mode.
  • Page 53 DSC OPERATION D Making a Polling Request Call (For only USA and Australian version transceivers) About Manual Entry: Make a Polling Request Call when you want to know a spe- Enter a desired individual ID in the following way: cific vessel is in the communication area, or not. •...
  • Page 54 DSC OPERATION ■ Making DSC calls D Making a Polling Request call (continued) r Push [CALL] to make a Polling Request Call. • If Channel 70 is busy, the transceiver stands by until the channel u Push [ALARM OFF] to stop the alarm, and then the screen becomes clear.
  • Page 55 DSC OPERATION D Making a Test call About Manual Entry: Testing on the exclusive DSC distress and safety calling Enter a desired address ID in the following way: channels should be avoided as much as possible. When test- • Select a desired number using Dial, or [Ω]/[≈]. ing on a distress or safety channel is unavoidable, you should •...
  • Page 56 DSC OPERATION ■ Making DSC calls D Making a Test call (continued) r Push [CALL] to make a Test call. u Push [ALARM OFF] to stop the alarm, and then the screen • If Channel 70 is busy, the transceiver stands by until the channel as shown below is displayed.
  • Page 57 DSC OPERATION D Making a Test Acknowledgement call About Received call information: When the “TEST ACK” in DSC settings is set to ‘Auto TX’ • Push [EXIT] to return to the normal operating mode. (p. 65), the transceiver automatically transmits a reply call •...
  • Page 58 DSC OPERATION ■ Making DSC calls D Making a Test Acknowledgement call (continued) Manual ACK: q Enter “TEST ACK” in the DSC CALLS menu. e The Test ACK confirmation screen is displayed. Push [CALL] to make an acknowledgement call. ➪ DSC Calls...
  • Page 59 DSC OPERATION D Making a Position Reply call About Received call information: Make a Position Reply call when a Position Request call is • Push [EXIT] to return to the normal operating mode. received. • Push [BACK] to return to the previous screen. When the “POSITION ACK”...
  • Page 60 Edit your latitude and longitude position and UTC time as follows: *For only the IC-M423G, IC-M423GE, and IC-M424G. w Select a desired Position Request call to reply to, using Dial or [Y]/[Z], then push Dial or [ENT].
  • Page 61 DSC OPERATION D Making a Position Report Reply call About Received call information: • Push [EXIT] to return to the normal operating mode. Make a Position Report Reply call when a Position Report • Push [BACK] to return to the previous screen. call is received.
  • Page 62 DSC OPERATION ■ Making DSC calls D Making a Position Report Reply call (continued) Manual Reply: q Enter “REPORT REPLY” in the DSC CALLS menu. e The Position Report Reply call confirmation screen is dis- played. ➪ DSC Calls ➪ Position Report Reply...
  • Page 63 DSC OPERATION D Making a Polling Request Reply call About Received call information: • Push [EXIT] to return to the normal operating mode. Make a Polling Request Reply call when a Polling Request • Push [BACK] to return to the previous screen. call is received.
  • Page 64 DSC OPERATION ■ Making DSC calls D Making a Polling Request Reply call (continued) Manual Reply: e The Polling Request Reply call confirmation screen is dis- q Enter “POLLING REPLY” in the DSC CALLS menu. played. Push [CALL] to make an acknowledgement call. ➪...

  • Page 65: Receiving Dsc Calls

    DSC OPERATION ■ Receiving DSC calls D Receiving a Distress Call/Distress Acknowledgement [Example]: Receiving a Distress Call. [INFO] ➥ Push to display the Received call information. (p. 63) When a Distress Call is received: [PAUSE] (For only USA version transceivers) ➥...
  • Page 66 DSC OPERATION ■ Receiving DSC calls (Continued) D Receiving a Distress Relay Call/Distress Relay Acknowledgement [INFO] [Example]: Receiving a Distress Relay call. ➥ Push to display the Received call information. (p. 63) When a Distress Relay call is received: [PAUSE] (For only USA version transceivers) ➥...
  • Page 67 DSC OPERATION D Receiving an Individual Call When an Individual Call is received: [INFO] ➥ The alarm sounds for 2 minutes. ➥ “RCVD INDIVIDUAL CALL” is displayed. The backlight may ➥➥➥ P ush to display the Received call information. (p. 63) blink for 2 minutes, depending on the received Category.
  • Page 68 DSC OPERATION ■ Receiving DSC calls (Continued) D Receiving a Group Call/Geographical Area Call/All Ships Call When a Group Call, Geographical Area Call, or All Ships Call [IGN] is received: ➥ Push to ignore the Call and return to the normal operating ➥...
  • Page 69 DSC OPERATION D Receiving a Position Request Call [IGN] When a Position Request Call is received: ➥➥➥ P ush to ignore the Call and return to the normal operating ➥ The alarm sounds for 2 minutes. mode. ➥➥ “RCVD POS REQUEST” is displayed. The backlight blinks •...
  • Page 70 DSC OPERATION ■ Receiving DSC calls (Continued) D Receiving a Position Report Call [EXIT] When a Position Report Call is received: ➥➥➥ P ush to ignore the Call and return to the normal operat- ➥ The alarm sounds for 2 minutes. ing mode.
  • Page 71 DSC OPERATION D Receiving a Polling Request call/Test Call [IGN] [Example]: Receiving a Polling Request call. ➥ Push to ignore the Call and return to the normal operat- ing mode. When a Polling Request call is received: • The transceiver exits the DSC mode. ➥...

  • Page 72: Transmitted Call Log

    DSC OPERATION ■ Transmitted Call log ■ Receiving DSC calls (Continued) D Receiving a Test Acknowledgement Call When a Test Acknowledgement Call is received: The transceiver automatically stores up to 50 transmitted ➥ The alarm sounds for 2 minutes. calls, and the logs can be used as a supplement to your log- ➥...

  • Page 73: Received Call Log

    DSC OPERATION ■ Received Call log The transceiver automatically stores up to 50 distress mes- e Push [Y]/[Z] to select the desired item, then push [ENT]. sages and 50 other messages, and they can be used as a supplement to your logbook. •...
  • Page 74 DSC OPERATION ■ Received Call log (Continued) D Other messages r Rotate Dial to scroll the DSC message contents. q Push [LOG] to enter “RCVD CALL LOG” in the DSC CALLS • The stored message has various information, depending on the menu, or you can enter it through the Menu screen.

  • Page 75: Dsc Settings

    DSC OPERATION ■ DSC Settings D Position Entry w Rotate Dial to select “Auto TX” or “Manual TX,” then push (See page 25) D Add Individual ID/Group ID [ENT]. (See pages 22, 23) • Push [BACK] to cancel and return to the DSC Settings menu. D Delete Individual ID/Group ID (See page 24) D Automatic Acknowledgement...
  • Page 76 DSC OPERATION ■ DSC Settings (Continued) D Channel Auto Switch function/Channel 16 Switch function Channel Auto Switch Function: Auto (No Delay): After receiving a DSC call, and [ACPT] (For only USA version transceivers) is pushed on the confirmation screen, By regulation, after receiving a DSC call, the transceiver the transceiver immediately changes changes the operating channel to the channel assigned by to the channel assigned by the re-...
  • Page 77 DSC OPERATION D Alarm D Channel 70 Squelch level Set the Alarm function ON or OFF, depending on the Cat- Set the squelch level on Channel 70. egory or Status. The transceiver has 11 squelch levels between 1 (loose squelch) and 10 (tight squelch) and OPEN. q Enter “ALARM”...
  • Page 78 DSC OPERATION ■ DSC Settings (Continued) D DSC Loop Test The DSC loop test function sends transmit DSC signals to the receive AF circuit to compare and check the TX and RX signals at the AF level. q Enter “DSC LOOP TEST” in the DSC Settings menu. ➪...

  • Page 79: Making An Individual Call Using An Ais Transponder

    DSC OPERATION ■ Making an Individual call using an AIS transponder When the optional MA-500TR/MA-510TR* CLASS B AIS TRANSPONDER is connected to your transceiver, an indi- vidual DSC call can be transmitted to a selected AIS target, without needing to enter the target’s MMSI code. In this case, the call type is automatically set to Routine.
  • Page 80 DSC OPERATION ■ Making an Individual call using an AIS transponder (Continued) r After making the individual DSC call, the transponder will ‘Able to comply’ is received display “DSC Transmission COMPLETED.” • Push [CLEAR] to return to the screen displayed before you en- tered the voice channel selection screen in step w.

  • Page 81: Other Functions

    OTHER FUNCTIONS ■ Using the Intercom The optional Intercom function allows you to talk between r After releasing [INCM CALL], hold down [PTT] and speak the transceiver and the where the Command microphone is into the microphone at your normal voice level. located.

  • Page 82: Using The Rx Speaker

    OTHER FUNCTIONS ■ Using the RX Speaker ■ Using the PA (Public Address) The RX Speaker function enables you to hear the received The transceiver has a PA function to make announcements audio through a PA speaker. through a PA speaker. Connect a PA speaker as described on page 84.

  • Page 83: Using The Horn

    OTHER FUNCTIONS ■ Using the Horn The Horn function sounds a horn. Connect a PA speaker as described on page 84. q Push [HORN] to enter the Horn mode. w Hold down [HORN] to sound a horn. • While holding down [HORN], the horn sounds, and the screen below is displayed.

  • Page 84: Menu Screen Operation

    MENU SCREEN OPERATION ■ Using the Menu screen Entering the Menu screen The Menu screen is used for entering infrequently changed values, function settings or making DSC calls. In addition to this page, see pages 75 through 83 for details. Example: Set the channel group to “USA”...

  • Page 85: Menu Screen Items

    MENU SCREEN OPERATION ■ Menu screen items D Radio Settings Item Ref. Item Ref. The Menu screen contains the following items. • Scan Type p. 76 • WX Alert* p. 77 • Scan Timer p. 76 • RT Indicator* p. 77 D DSC Calls •...

  • Page 86: Radio Settings Items

    MENU SCREEN OPERATION ■ Radio Settings items D Scan type D Dual/Tri-watch The transceiver has two scan types, Normal scan and Prior- This item can be selected as Dualwatch or Tri-watch. (p. 21) ity scan. A Normal scan searches all Favorite channels in the (Default: Dualwatch) selected channel group.
  • Page 87 MENU SCREEN OPERATION D Weather alert D RT Indicator (For only USA and Australian version transceivers) (For only USA version transceivers) A NOAA broadcast station transmits a weather alert tone be- Select weather or not to display RT (Radio Telephone) icon fore important weather information.

  • Page 88: Configuration Items

    MENU SCREEN OPERATION ■ Configuration items D Backlight D Key Assignment The function display and keys can be backlit for better visibil- Desired functions can be assigned to Dial and the softkeys. ity under low light conditions. q When the “KEY ASSIGNMENT” screen is displayed, rotate The backlight can be set to 7 levels and OFF.
  • Page 89 MENU SCREEN OPERATION r Push [EXIT] to exit the Menu screen. • Softkeys assignment • Push [CLEAR] or [BACK] to return to the previous screen. The desired function can be assigned as the softkey func- tion. The assigned function can be used when its key icon is •...
  • Page 90 MENU SCREEN OPERATION • RX ■ Configuration items (Continued) D UTC Offset Turn the receive Noise Cancel function ON or OFF. Set the offset time between the UTC (Universal Time Coordi- OFF : Turns OFF the function. (Default) nated) and your local time to between –14:00 and +14:00 (in : The Noise Cancel function reduces random noise com- 1 minute steps).
  • Page 91 MENU SCREEN OPERATION D Inactivity Timer • Not DSC Related When the LCD displays a screen other than the normal opera- Set the inactivity timer to between 1 and 10 minutes (in 1 tion screen, or one not related to the DSC, and no key opera- minute steps) or OFF for a “Not DSC Related”...
  • Page 92 NMEA Output port. Output port to an external device. Station List: Outputs the call from any vessels listed on *For only the IC-M423G, IC-M423GE, and IC-M424G. the Individual ID screen. OFF: Does not output any call to an external de-...
  • Page 93 MENU SCREEN OPERATION D Remote ID Set a Remote ID number to between 1 and 69. The Remote ID is included in the sentence of the Icom origi- nal NMEA format. (Default: 15) D COMMANDMIC Speaker (Displayed only when the optional HM-195 is connected.) The HM-195’s external speaker can be used instead of the...

  • Page 94: Connections And Maintenance

    CONNECTIONS AND MAINTENANCE ■ Connections The figure shows the IC-M423GE. • Green: Listener B (Data-L), GPS In (–) Yellow: Listener A (Data-H), GPS In (+) Connect to NMEA output lines of a GPS receiver for posi- tion data. • A NMEA 0183 ver. 2.0 or later RMC, GGA, GNS, GLL, VTG, GSV, and GSA sentence format compatible GPS receiver is re- quired.
  • Page 95 510TR Instruction manual for the MA-510TR’s connecting Use a PH M3 × 6 screw (user supplied). instructions. NOTE for the IC-M423, IC-M423G, IC-M424, and IC- M424G: The location of the ground terminal is the same as the GPS antenna connector on the IC-M423GE.

  • Page 96: Antenna

    CONNECTIONS AND MAINTENANCE ■ Antenna ■ Supplied accessories A key element in the performance of any communication sys- Mounting bracket For mounting bracket tem is the antenna. Ask your dealer about antennas and the best place to mount them. Knob bolts Flat washers (M5) ■...

  • Page 97: Mounting The Transceiver

    NOTE: Check the installation angle; the function display (User supplied) may not be easy-to-read at some angles. NOTE for the IC-M423G and IC-M424G: Built-in GPS receiver is located at the right top of the front panel. If the transceiver is covered with any object that interrupts the GPS signals from the satellites, the GPS receiver will not calculate its position.

  • Page 98: Installation

    CONNECTIONS AND MAINTENANCE ■ MB-132 installation An optional MB-132 is available for mounting e Attach the clamps on either side of the transceiver with two flush mount the transceiver to a flat surface, such as an instrument panel. M5 × 8 mm supplied bolts. •...

  • Page 99: Microphone Installation

    CONNECTIONS AND MAINTENANCE ■ Microphone installation e Using the mounting base as a template, carefully mark the holes where the cable and three screws will be fastened. r Drill holes at these marks. t Install the mounting base using the supplied screws, as shown below.
  • Page 100 CONNECTIONS AND MAINTENANCE Mounting base Gasket...

  • Page 101: Specifications And Options

    180(W) × 82(H) × 119.9(D) mm (CHN/AUS version) –5 dBµ emf typical (1% BER) ; 7.1(W) × 3.2(H) × 4.7(D) inches • Squelch sensitivity: (Projections not included) IC-M423/IC-M423G/IC-M423GE Less than –2 dBµ emf • Weight (approximate): 1.2 kg; 2.6 lb IC-M424/IC-M424G Less than –10 dBµ...

  • Page 102: Options

    SPECIFICATIONS AND OPTIONS D Dimensions ■ Specifications D Receiver (continued) Unit: mm (inch) 164.1 (6.5) • Intermodulation rejection ratio: IC-M423/IC-M423G/IC-M423GE More than 68 dB IC-M424/IC-M424G More than 70 dB IC-M423 180 (7.1) 25.3 109.7 (4.3) (CHN/AUS version) More than 70 dB More than 68 dBµ...

  • Page 103: Channel List

    CHANNEL LIST Channel Number Frequency (MHz) Channel Number Frequency (MHz) Channel Number Frequency (MHz) Channel Number Frequency (MHz) USA* INT CAN* Transmit Receive USA* INT CAN* Transmit Receive USA* INT CAN* Transmit Receive USA* INT CAN* Transmit Receive 156.050 160.650 157.050 161.650 1065 1065* 1065*...

  • Page 104: Troubleshooting

    • The position and time have not been manu- objects interrupts the satellites signal. played instead of the ally entered. ( For only the IC-M423G and IC-M424G) position and time. • Check the GPS antenna is positioned where ( For only IC-M423G,...

  • Page 105: Template

    TEMPLATE 180 (7 ⁄ 165.1 (6 ⁄ ⁄ R12 (Max.) HM-195 MB-132 29.5 to 31.5 (d) ⁄ to 1 ⁄ Unit: mm (inch)

  • Page 107: Information

    INFORMATION ■ About CE and DOC ■ Disposal Hereby, Icom Inc. declares that the versions The crossed-out wheeled-bin symbol on your IC-M423/IC-M423G/IC-M423GE which product, literature, or packaging reminds you that have the “CE” symbol on the product, comply in the European Union, all electrical and electronic...

  • Page 108: Index

    INDEX Horn ..........73 Accessories, supplied ....... 86 Display contrast ........ 78 Acknowledgement, Automatic ..65 Disposal ..........97 Alarm ..........67 Distress Acknowledgement ....55 IMPORTANT ........i All Ships call Distress Call Inactivity Timer........81 Making a call ........38 Making a call ........
  • Page 109 INDEX NMEA Output ........82 Scan Noise Cancel ........80 Scan resume timer ....... 76 Scan types ........19 Starting a scan ......20 Operating Rules ........1 Softkey function ........7 Operation, basic ....... 11 Specifications ........91 Options ..........92 Speaker Microphone ......
  • Page 110 A7197D-1EX-8a Printed in Japan 2014–2020 Icom Inc. Jul. 2020 © 1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan...

This manual is also suitable for:

Ic-m423Ic-m423geIc-m424Ic-m424gM424g-21

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