Document Outline

• Ray54 Marine VHF Radio
• About this Handbook
  • Introduction
  • Conventions Used
  • Technical Accuracy
  • Warranty
• Important Information
  • FCC Notice
  • Station License
  • Operator License
  • INDUSTRY CANADA
  • SAFETY NOTICE
    • CAUTION: Navigation Aid
      • Although we have designed this product to be accurate and reliable, many factors can affect its performance including equipment ...
    • Antenna Mounting and EME Exposure
      • WARNING: Maximum Permissible Exposure
    • Safe Compass Distance
    • EMC Conformance
• Contents
  • About this Handbook iii
  • Important Information iv
    • Antenna Mounting and EME Exposure vi
    • Safe Compass Distance vi
    • EMC Conformance vi
    • Chapter 1: Introduction 1
      • 1.1 Ray54 Fixed Station VHF Radio 1
      • 1.2 Features 1
    • Chapter 2: Installation 3
      • 2.1 Unpacking and Inspection 3
      • 2.2 Planning the Installation 4
      • 2.3 Power Connections 6
      • 2.4 External Speaker Connections 7
      • 2.5 Grounding 7
      • 2.6 NMEA Data 7
      • 2.7 Antenna Connections 8
    • Chapter 3: Getting Started 9
      • 3.1 Keypad and Rotary Knobs 9
      • 3.2 LCD Display 14
    • Chapter 4: General Operations 17
      • 4.1 Turning the Power ON and OFF 17
      • 4.2 Setting the Volume 17
      • 4.3 Setting the Squelch 17
      • 4.4 Setting the Power Output 17
      • 4.5 Setting the Channel 19
      • 4.6 Selecting a Weather Channel 19
      • 4.7 Selecting the Priority Channel 20
      • 4.8 Selecting the Secondary Priority Channel 21
      • 4.9 Transmitting 23
      • 4.10 Using the Scan Modes 23
      • 4.11 Adding Channels to Memory 26
      • 4.12 Using the Monitor Modes 28
      • 4.13 USER Channel Mode 30
      • 4.14 DSC Call Operation 30
      • 4.15 Menu Mode Operation 30
    • Chapter 5: Digital Selective Calling (DSC) 31
      • 5.1 DSC Call Function 32
      • 5.2 Individual Calls 34
      • 5.3 Group Calls 38
      • 5.4 All Ships Calls 42
      • 5.5 Distress Calls 45
      • 5.6 Position Request 50
      • 5.7 Call Log 53
      • 5.8 DSC Distress Log 56
    • Chapter 6: Menu Settings 57
      • 6.1 Menu Function 57
      • 6.2 DSC Phonebook 59
      • 6.3 Local / Distant 63
      • 6.4 Backlight Adjustment 63
      • 6.5 Contrast Adjustment 63
      • 6.6 GPS/Time Setup 64
      • 6.7 Settings 66
      • 6.8 Radio Setup 69
      • 6.9 DSC Setup 71
      • 6.10 Resetting Factory Defaults 80
    • Chapter 7: Customer Service 81
      • 7.1 How to Contact Raymarine 81
    • Appendix A: Specifications 83
    • Appendix B: Channel List 85
    • Appendix C: Glossary 97
    • Index 99
• Chapter 1: Introduction
  • 1.1 Ray54 Fixed Station VHF Radio
    • Figure 1-1: Ray54 VHF Radio
  • 1.2 Features
    • Digital Selective Calling (DSC)
• Chapter 2: Installation
  • 2.1 Unpacking and Inspection
    • Equipment Supplied
  • 2.2 Planning the Installation
    • Typical Mounting Methods
    • Flush Mounting
      • Figure 2-1: Typical Mounting Methods
      • CAUTION: Make sure there are no hidden electrical wires or other items behind the desired location before proceeding. Check that free access for mounting and cabling is available.
        • Figure 2-2: Mounting Dimensions
  • 2.3 Power Connections
    • Figure 2-3: Wiring Connections
  • 2.4 External Speaker Connections
  • 2.5 Grounding
  • 2.6 NMEA Data
    • Figure 2-4: GPS Wiring
  • 2.7 Antenna Connections
    • Antenna Mounting Suggestions
      • Antenna Mounting and EME Exposure
• Chapter 3: Getting Started
  • 3.1 Keypad and Rotary Knobs
    • Figure 3-1: Ray54 Keys Layout
    • Microphone Keys
    • Main Unit Rotary Keys
    • Main Unit Push Keys
    • Microphone
      • 1. PTT
      • 2. UP/DOWN
      • 3. 16/9
      • 4. HILO
    • Main Unit
      • 5. CH
      • 6. PWR/VOL
      • 7. SQ
      • 8. DW/TRI
      • 9. CALL/MENU
      • 10. HILO/USER
      • 11. SCAN / SAVE
      • 12. 16/9
      • 13. CLEAR/WX
      • 14. DISTRESS
  • 3.2 LCD Display
    • Figure 3-2: Ray54 LCD Layout
    • 1. (HI/LO) TX Power
    • 2. (TX) Transmitting
    • 3. (RX) Receiving
    • 4. (LOCAL) Local/Distant Mode
    • 5. DSC Message
    • 6. ATIS Active
    • 7. NO GPS
    • 8. Battery Low
    • 9. (USER) Favorite Channel Mode
    • 10. (SAVED) Memory Mode
    • 11. (WX) Weather Channel
    • 12. (ALERT) Weather Alert
    • 13. (U I C) Channel Set
    • 14. (A) Simplex Channel
    • 15. (B) Receive-only Channel
    • 16. Channel Number
    • 17. Dot Matrix Display
      • Figure 3-3: Typical Dot Matrix Display Data
• Chapter 4: General Operations
  • 4.1 Turning the Power ON and OFF
    • 1. Beeps, illuminates the backlight at full brightness, and displays all segments and indicators for 2 seconds.
      • 2. Displays the software version number on the dot matrix display.
      • 3. Recalls the last CH number, TX power settings and operation mode. If no last-used setting data exists, goes to CH 16 and high TX Power.
  • 4.2 Setting the Volume
  • 4.3 Setting the Squelch
  • 4.4 Setting the Power Output
    • Overriding the Low Output Power Restriction
      • To override the LO power restriction on channels 13 or 67 and transmit at high power:
  • 4.5 Setting the Channel
    • On the microphone...
    • On the main unit...
  • 4.6 Selecting a Weather Channel
    • 1. WX broadcasts can only be heard in the US and Canada.
      • 2. During Weather mode, the PTT, HILO/USER, SCAN/SAVE and DW/TRI keys are disabled and an error beep sounds if pressed.
    • Weather Alert Operation
  • 4.7 Selecting the Priority Channel
  • 4.8 Selecting the Secondary Priority Channel
    • Reprograming the Secondary Priority Channel
      • 1. Press and hold the 16/9 key for greater 3 seconds to switch to the Secondary Priority Channel.
        • 2. Press and hold the 16/9 key for greater 3 seconds again to switch to Reprogram mode. The current Secondary Priority Channel flashes.
        • 3. Change the channel number with the CH key.
        • 4. Push the CH key to ACCEPT the new Secondary Priority selection. An alert tone sounds to indicate that the Secondary Priority Channel has been changed.
  • 4.9 Transmitting
  • 4.10 Using the Scan Modes
    • All Scan
    • Saved (Memory) Scan
    • Priority All Scan
    • Priority Saved Scan
  • 4.11 Adding Channels to Memory
    • To Add Channels to Memory
    • 1. During normal operation mode, use the CH knob to select the desired channel for programming.
      • 2. Press and hold the SCAN/SAVE key for 3 seconds.
      • To delete channels from memory
    • 1. During the normal mode, use the CH knob to select the channel to be deleted.
      • 2. Press and hold the SCAN/SAVE key for 3 seconds.
  • 4.12 Using the Monitor Modes
    • Dual Watch
    • Tri Watch
  • 4.13 USER Channel Mode
  • 4.14 DSC Call Operation
  • 4.15 Menu Mode Operation
• Chapter 5: Digital Selective Calling (DSC)
  • 1. SAFETY Calls for advisory alerts or
    • 2. URGENCY when the assistance is required but the situation is not serious enough for a Distress Call
  • 5.1 DSC Call Function
    • Using the Microphone Keys to Make Selections
  • 5.2 Individual Calls
    • Making DSC Calls to Coast Stations
    • Transmitting an Individual Call
      • 1. Press and release the CALL/MENU key to enter the DSC menu. The arrow is pointing to INDIVIDUAL.
        • 2. Push the CH knob to select INDIVIDUAL. The Individual menu appears, which displays the Phonebook entries you have saved and <MANUAL> for manual number entry.
        • 3. Rotate the CH knob until the arrow points to the desired individual name.
        • 4. Push in the CH knob to select the desired individual name/MMSI ID.
        • 5. Rotate the CH knob to select the working channel to be used for the Individual Call.
        • 6. Push in the CH knob to accept the selection.
        • 7. Push CH knob again to send the Individual Call. The Individual Call is transmitted on channel 70, and then the radio tunes to the original channel and waits for acknowledgement. During this period you are still able to receive calls.
        • 8. Press PTT to communicate on the specified channel.
    • Receiving Individual Calls
      • To silence the alert tone:
      • To cancel the mode without sending ACK:
      • To accept the Individual Call:
      • Notes: (1) The DSC Call data is stored in the first available slot in the DSC Call Log, regardless of whether the call is acknowledged.
        • (2) Pressing the 16/9 key cancels the channel change request and tunes the radio to channel 16.
        • (3) If 5 minutes elapse before the call is acknowledged or rejected, the radio automatically declines the incoming Individual Call. No Acknowledgement is sent and the radio reverts to the original channel.
  • 5.3 Group Calls
    • Transmitting a Group Call
      • 1. Press and release the CALL/MENU key to enter the DSC menu. The arrow is pointing to INDIVIDUAL.
        • 2. Rotate the CH knob until the arrow points to GROUP.
        • 3. Push in the CH knob to select GROUP. The Group Call menu appears, which displays the Group entries you have saved.
        • 4. Rotate the CH knob until the arrow points to the desired Group name.
        • 5. Push the CH knob to select the desired Group.
        • 6. Rotate the CH knob to select the working channel to be used for the Group Call.
        • 7. Push in the CH knob to accept the selection.
        • 8. Push the CH knob again to send the Group Call. The Group Call is transmitted on channel 70, and then the radio tunes to the designated working channel to be used for the Group Call.
        • 9. Press PTT to communicate on the specified channel.
    • Receiving Group Calls
      • To silence the alert tone:
      • To ignore the Group Call:
      • To accept the Group Call:
      • Notes: (1) DSC Call data is stored in the first available slot in the Call Log.
        • (2) Pressing the 16/9 key cancels the channel change request and tunes the radio to channel 16.
        • (3) If 5minutes elapse before the Group Call is accepted or rejected, the radio automatically declines the call and the radio reverts to the original channel.
  • 5.4 All Ships Calls
    • Transmitting an All Ships Call
      • 1. Press and release the CALL/MENU key to enter the DSC menu. The arrow is pointing to INDIVIDUAL.
        • 2. Rotate the CH knob until the arrow points to ALL SHIPS.
        • 3. Push in the CH knob to select ALL SHIPS. The All Ships menu appears, which displays the categories from which you can select.
        • 4. Rotate the CH knob to select URGENCY or SAFETY.
        • 5. Press the CH knob again to send the call.
        • 6. Push CH one more time to reconfirm the All Ships Call. The call is transmitted on channel 70, and then the radio tunes to channel 16 at high power.
        • 7. Press PTT to communicate on the channel 16.
    • Receiving an All Ships Call
      • To silence the alert tone:
      • To decline the All Ships Call:
      • To accept the All Ships Call:
      • Notes: (1) For All Ships Urgency Calls, the AUTO CH CHG option (see page 78) determines whether your radio automatically switches to channel 16 to receive the call or instead prompts you to manually accept or decline the channel change.
        • (2) Pressing the 16/9 key cancels the channel change request and tunes the radio to channel 16.
        • (3) If 5 minutes elapse before the All Ships Call is acknowledged or rejected, the radio automatically declines the incoming call and the radio reverts to the original channel.
        • (4) DSC call data is stored in the first available slot in the Call Log, regardless of whether the call is acknowledged.
  • 5.5 Distress Calls
    • Sending a Distress Call
      • Undesignated (Quick) Distress Call
        • 1. Press and hold the red DISTRESS key for 3 seconds to initiate the call. During this time, the radio beeps, the display flashes and a timer counts down 3...2...1.
      • Designated Distress Call
        • 1. Press and release the red DISTRESS key. The Distress Call screen appears.
          • 2. Rotate the CH knob until the arrow points to the type of Distress you wish to designate.
          • 3. Push in the CH knob to select that type of Distress.
          • 4. Press and hold the DISTRESS key for 3 seconds to initiate the call. During this time, the radio beeps, the display flashes and a timer counts down 3...2...1.
    • Cancelling a Distress Call Made in Error
      • 1. Immediately power off the radio to cancel the Distress Call.
        • 2. Power the radio back on and set to channel 16.
        • 3. Make a broadcast to all stations giving your ship’s name, call sign and MMSI number and cancel the false distress alert.
    • Receiving a Distress Call
      • To silence the alarm:
    • Receiving a Distress ACK Sent from a Coast Station
    • Receiving a Distress Relay Sent by Another Station
  • 5.6 Position Request
    • Specifying the Target Vessel
      • 1. Press and release the CALL/MENU key to enter the DSC menu. The arrow is pointing to INDIVIDUAL.
        • 2. Rotate the CH knob to select POS REQUEST.
        • 3. Push in the CH knob to select POS REQUEST. The Position Request menu appears.
        • 4. Push the CH knob again to select SEND. Choose the target vessel from the phonebook.
        • 5. Rotate the CH knob until the arrow points to the desired name.
        • 6. Push in the CH knob to select the desired name/MMSI ID.
        • 7. Press the CH knob again to send the Position Request Call. The call is transmitted on channel 70, and then the radio tunes to the original channel and waits for acknowledgement. During this period you are still able to receive calls.
    • Retrieving the Last Received Position Data
      • 1. From the Position Request screen, rotate CH to select LAST RECVD.
        • 2. Push the CH knob to select. The last received position request data is displayed.
    • Receiving a Position Request From Another Station
  • 5.7 Call Log
    • 1. Press and release the CALL/MENU key to enter the DSC menu. The arrow is pointing to INDIVIDUAL.
      • 2. Rotate the CH knob until the arrow points to CALL LOG.
      • 3. Push in the CH knob to select the Call Log. Entry 01 appears first with call type and time of the last call. This is the most recent call.
      • 4. Using the CH knob, scroll down the list of up to 20 entries.
    • Making a Call from a Call Log Entry
      • 1. Rotate the CH knob until the log entry you wish to call appears.
        • 2. For received Individual or All Ships Call, push the CH knob. The Individual Call screen appears addressed to the caller.
        • 3. Follow the same directions you would for initiating an Individual Call using the Phonebook, as outlined on page 34.
        • 4. To make a Group Call using the Call Log, push the CH knob to bring up the Group Call menu and make the call as described in Transmitting a Group Call on page 5-38.
    • Saving an MMSI ID Number from a Call Log Entry
      • 1. Rotate the CH knob to select the desired Call Log entry.
        • 2. Press and hold the SCAN/SAVE key. The MMSI number is entered in the appropriate field of the Phonebook.
        • 3. Use the CH knob to enter the NAME that you wish to have associated with this MMSI ID number. Rotate the CH knob to select each character and then push in the knob to accept it.
        • 4. When the NAME entry is complete, push in the CH knob to accept it.
  • 5.8 DSC Distress Log
    • To view the Distress Call Log:
    • 1. Press and release the CALL/MENU key to enter the DSC menu. The arrow is pointing to INDIVIDUAL.
      • 2. Rotate the CH knob until the arrow points to DISTRES LOG.
      • 3. Push the CH knob to select the Distress Log. Entry 01 (the most recent call) appears first with call type and position data. The screen then flashes to display the nature of the distress and time of the call.
      • 4. Rotate the CH knob to scroll down the list of up to 10 entries.
• Chapter 6: Menu Settings
  • 6.1 Menu Function
    • To make Menu selections:
    • 1. Press and hold the CALL/MENU key to enter Menu mode. The list of available functions appear on the dot matrix display.
      • 2. Rotate the CH knob to scroll down the list until the arrow points to the desired function. Push the CH knob to accept.
    • Using the Microphone Keys to Make Selections
  • 6.2 DSC Phonebook
    • Adding an Entry
      • 1. Press and hold the CALL/MENU knob. The Menu screen appears on the dot matrix display.
        • 2. Press the CH knob to select Phonebook. The Phonebook screen appears.
        • 3. Press and release the CH knob to select <NEW ENTRY>.
        • 4. Using the CH knob, fill in the NAME field one character at a time. The first character space to be modified is highlighted wi...
        • i. Rotate the CH knob to scroll through the selections.
          • ii. When the desired character appears, push in the CH knob to accept it. The next character to be filled in sequence is underlined (_).
          • iii. Continue this process until all characters have been selected.
          • 5. Continue this process until all NAME characters are selected. Press and hold the CH knob to accept the name and move on to the MMSI ID.
          • 6. Use same procedure to enter the MMSI characters.
          • 7. When all characters have been selected, press the CH knob to SAVE. The new entry appears in the Phonebook.
    • Editing an Existing Entry
      • 1. From the Phonebook, rotate the CH knob until the arrow on the dot matrix display points to the entry you wish to edit.
        • 2. Push in the CH knob to select the name.
        • 3. Push the CH knob again to select EDIT.
        • 4. Make your changes to the NAME and MMSI ID, using the CH knob.
        • 5. When finished, push the CH knob to SAVE. The revised name appears in the list.
    • Deleting an Existing Entry
      • 1. From the Phonebook, rotate the CH knob until the arrow on the dot matrix display points to the entry you wish to delete.
        • 2. Push the CH knob to select the name.
        • 3. Rotate the CH knob until the arrow is pointing to DELETE.
        • 4. Press and hold the CH knob. The entry is removed.
  • 6.3 Local / Distant
  • 6.4 Backlight Adjustment
    • To adjust the backlight setting:
    • 1. Rotate the CH knob until the arrow points to BACKLIGHT.
      • 2. Push the CH knob to accept. The Backlight screen appears.
      • 3. Rotate the CH knob to select the desired backlight level. The number of blocks illuminated on line 3 of the dot matrix displa...
  • 6.5 Contrast Adjustment
    • To adjust the contrast setting:
    • 1. Rotate the CH knob to scroll until the arrow points to CONTRAST.
      • 2. Push the CH knob to accept. The Contrast screen appears.
      • 3. Rotate the CH knob to select the desired contrast level. The number of blocks illuminated on line 3 of the dot matrix display...
      • 4. Push the CH knob to accept your selection.
  • 6.6 GPS/Time Setup
    • When GPS Information Not Available
      • To manually set the GPS position and time settings:
      • 1. Rotate the CH knob to scroll down the list until the arrow points to GPS/ TIME.
        • 2. Push in the CH knob. The arrow is pointing to MANUAL POS.
        • 3. Push CH again to accept. The Manual Position screen appears.
        • 4. Using the CH knob, fill in the Lat/Lon information, one character at a time. The first character space is highlighted with a flashing underline.
        • i. Rotate the CH knob to scroll through the selections.
          • ii. When the desired character appears, push in the CH knob to accept it. The next character to be filled in sequence is underlined (_).
          • iii. Continue this process until all latitude data been selected.
          • 5. Use the same process to complete longitude information.
          • 6. Push in the CH knob to accept and move onto UTC time. Select the time characters in the same manner.
  • 6.7 Settings
    • To adjust these Settings:
    • 1. Press and hold the CALL/MENU key to enter Menu mode.
      • 2. Rotate the CH knob until the arrow points to GPS/TIME.
      • 3. Push the CH knob to accept. The GPS/Time screen appears.
      • 4. Rotate the CH knob and scroll down the list to SETTINGS.
      • 5. Push the CH knob to accept.
    • Latitude/Longitude Display
    • Time Display
    • Time Offset
    • Time Format
    • COG/SOG Display
  • 6.8 Radio Setup
    • To adjust these settings:
    • 1. Press and hold the CALL/MENU key to enter Menu mode.
      • 2. Rotate the CH knob to scroll down the list until the arrow points to RADIO SETUP.
      • 3. Push the CH knob to accept. The Radio Setup screen appears.
    • Band
    • Channel (CH) Name
      • Display Name
      • CH Info
        • 1. From the CH NAME menu item, rotate the CH knob until the arrow on the dot matrix display points to CH INFO.
          • 2. Push in the CH knob to select. The currently assigned name appears.
          • 3. Push the CH knob to display your options: EDIT changes the channel name displayed. CLEAR completely removes the channel name. The top line of the dot matrix display is blank for that channel.
          • 4. Push CH again to select EDIT or CLEAR.
          • 5. If you select EDIT, use the CH knob to modify the NAME field using the same technique described in Adding an Entry on page 59.
      • Deleting a Channel Name Entry
    • Ring Volume
    • Key Beep
  • 6.9 DSC Setup
    • To adjust the DSC Settings:
    • 1. Press and hold the CALL/MENU key to enter Menu mode.
      • 2. Rotate the CH knob to scroll down the list until the arrow points to DSC SETUP.
      • 3. Push the CH knob to accept. The DSC Setup screen appears.
    • My MMSI ID
      • To enter or view the MMSI ID number:
      • 1. From the DSC SETUP menu item described on page 71, rotate the CH knob until the arrow points to MY MMSI ID.
        • 2. Push the CH knob to accept. If an existing MMSI ID is stored, the value appears. If the MMSI ID is blank, dashes appear, indicating that one has yet to be entered.
        • 3. To enter the MMSI ID number, rotate the CH knob to select the digits using the same technique described in Adding an Entry on page 59.
        • 4. When all digits are selected, press and hold the CH knob to accept.
        • 5. Re-enter all nine MMSI digits.
        • 6. When complete, press and hold the CH knob to accept.
        • 7. Press the CH knob one last time to save the MMSI ID number.
    • Group MMSI Setup
      • Adding a New Group
        • 1. From the DSC SETUP menu item described on page page 71, rotate the CH knob until the arrow points to GROUP SETUP.
          • 2. Press the CH knob to accept. If an existing Group name and MMSI ID number are already stored, those values appear. If blank, <EMPTY 1>, <EMPTY 2>, and <EMPTY 3> are shown to indicate that the Group IDs have not yet been programmed into the radio.
          • 3. Rotate the CH knob until the arrow points to the first available empty group location.
          • 4. Press the CH knob to accept. The first field for you to enter data is the GROUP NAME.
          • 5. Use the CH knob to modify the GROUP NAME field using the same technique described in Adding an Entry on page 59.
          • 6. Continue this process until all GROUP NAME characters have been entered. Press and hold the CH knob to accept the name and move on to the GROUP ID.
          • 7. Use the same procedure to enter the GROUP ID numbers.
          • 8. Press and hold the CH knob to accept.
          • 9. Press the CH knob one more time to save. The new entry appears in the list.
      • Editing an Existing Entry
        • 1. From the DSC SETUP menu item described on page page 71, rotate the CH knob until the arrow points to GROUP SETUP.
          • 2. Press the CH knob to accept.
          • 3. Rotate the CH knob until the arrow points to the group location you wish to edit.
          • 4. Press the CH knob to select that Group.
          • 5. Press the CH knob again to select EDIT.
          • 6. Make your changes, using the CH knob using the same technique described in Adding an Entry on page 59.
          • 7. Press and hold the CH knob to accept your changes.
          • 8. Press the CH knob to save. The revised entry appears in the list.
    • Position Reply
      • To enable/disable Position Reply:
      • 1. From the DSC SETUP menu item described on page page 71, rotate the CH knob until the arrow points to POS REPLY.
        • 2. Press the CH knob to accept.
        • 3. Rotate the CH knob to select the desired setting and push to accept.
    • Automatic Channel Changing for Incoming Calls
      • To enable/disable the channel change:
      • 1. From the DSC SETUP menu item described on page page 71, rotate the CH knob until the arrow points to AUTO CH CHG.
        • 2. Press the CH knob to accept.
      • Procedure When Enabled
      • Procedure When Disabled
  • 6.10 Resetting Factory Defaults
    • To perform the reset:
    • 1. Press and hold the CALL/MENU key to enter Menu mode.
      • 2. Rotate the CH knob to scroll down the list until the arrow points to RESET.
      • 3. Press the CH knob to accept. The Reset screen appears.
      • 4. Rotate the CH knob until arrow points to YES.
      • 5. Press the CH knob to accept.
• Chapter 7: Customer Service
  • 7.1 How to Contact Raymarine
    • On the Internet
      • Customer Support
      • Accessories and Parts
      • Technical Support
      • Product Repair and Service
• Appendix A: Specifications
• Appendix B: Channel List
  • U.S. Marine VHF Channels and Frequencies
    • 1. The letter “A” following a channel number indicates simplex use of the ship station transmit side of an international duplex channel. Operations are different from that of international operations on that channel.
      • 2. Channel 13 should be used to contact a ship when there is danger of collision. All ships of length 20 meters or greater are required to guard VHF channel 13, in addition to VHF channel 16, when operating within U.S. territorial waters.
      • 3. Channel 16 is used to hail other stations or for distress alerting.
  • Canadian Marine VHF Channels and Frequencies
    • 1. The letter “A” following a channel number indicates simplex use of the ship station transmit side of an international duplex channel. Operations are different from that of international operations on that channel.
      • 2. Channel 16 is used for calling other stations or for distress alerting.
      • 3. The letter “B” following a channel number indicates simplex use of the coast station transmit side of an international duplex channel. That is, the channel is Receive Only.
      • 4. Channel 70 is used exclusively for Digital Selective Calling (DSC) and is not available for regular voice communications.
      • 5. Channels 75 and 76 are reserved as guard bands for Channel 16 and are not available for regular voice communications.
  • International Marine VHF Channels & Frequencies
    • 1. Channel 06 may also be used for communications between ship stations and aircraft engaged in coordinated search and rescue op...
      • 2. Channels 10 or 73 (depending on location) are also used for the broadcast of Marine Safety Information by the Maritime and Coast Guard Agency in the UK only.
      • 3. Channel 13 is designated for use on a worldwide basis as a navigation safety communication channel, primarily for intership navigation safety communications.
      • 4. Channels 15 and 17 may also be used for on-board communications provided the effective radiated power does not exceed 1 Watt.
      • 5. The use of Channels 75 and 76 should be restricted to navigation related communication only and all precautions should be taken to avoid harmful interference to channel 16. Transmit power is limited to 1 Watt.
  • WX Channels (North America only)
• Appendix C: Glossary
• Index
  • Symbols
  • Numerics
  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • K
  • L
  • M
  • O
  • P
  • R
  • S
  • T
  • U
  • V
  • W