Cobra Electronics MRF45 Digital Selective Calling DSC, Maritime Mobile Service Identity Mmsi

Page 7

Digital Selective Calling (DSC)

VHF Marine Radio Protocols

For Example

The vessel Corsair calling the vessel Vagabond:

Corsair: “Vagabond, this is Corsair.”

Vagabond: “Corsair, this is Vagabond. Reply 72 (or any proper working channel).”

Corsair: “72” or “Roger”

■After communications are completed, each vessel must sign off with its call sign or vessel name and switch to Channel 16.

NOTE

For best sound quality at the station you’re calling, hold the microphone at least 2 inches [5 cm] from your mouth and slightly off to

one (1) side. Speak in a normal tone of voice.

Digital Selective Calling (DSC)

•

Digital selective calling is a semi-automated system for establishing a radio call. It has been designed by the International Maritime Organization (IMO) as an international standard for VHF, MF, and HF calls and is part of the Global Maritime Distress and Safety System (GMDSS).

DSC will eventually replace aural (listening) watches on distress frequencies and will be used to announce routine and urgent maritime safety information broadcasts. Until DSC is fully implemented, it is still necessary to maintain a listening watch on Channel 16.

The DSC system allows mariners to instantly send a distress call with GPS position coordinates (requires a GPS receiver to be connected to the radio) to the Coast Guard and other vessels within range of the transmission.

DSC also allows mariners to initiate and receive distress, urgent, safety, routine, position request, position send, and group calls between vessels equipped with DSC capable radios.

Maritime Mobile

Service Identity (MMSI)

VHF Marine Radio Protocols

Maritime Mobile Service Identity (MMSI)

•

An MMSI is a nine (9) digit number used on a marine radio capable of using digital selective calling (DSC). It is used to selectively call other vessels or shore stations and is similar to a telephone number.

For your CobraMarine radio to operate in the DSC mode, you must enter your maritime mobile service identity (MMSI) number. See page 49 for instructions on how to enter it.

The MMSI Number Is Available In The U.S.A. From Any Of Three (3) Sources:

■BoatU.S.: 1-800-563-1536 – www.boatus.com/mmsi

■Maritel: 1-888-Maritel (1-888-627-4835)

■Sea Tow International: 1-631-765-3660 – www.seatow.com

In Canada, Contact:

■Industry Canada Spectrum Management Office (only available on the Internet): http://strategis.ic.gc.ca/epic/internet/insmt-gst.nsf/vwGeneratedInterE/sf01742e.html

To Obtain An MMSI Number Outside The U.S.A.:

Users can obtain an MMSI from their country’s telecommunications authority or ship registry. This may involve amending or obtaining a ship station license.

WARNING

This equipment is designed to generate a digital maritime distress and safety signal to facilitate search and rescue. To be effective as a safety device, this equipment must be used only within communication range of a shore-based VHF marine channel to distress and safety watch system. The range of the signal may vary, but under normal conditions should be approximately 20 nautical miles.

 

 

 

 

8 English

Nothing Comes Close to a Cobra® 9

 

Page 6 Page 8
Image 7
Page 6 Page 8
Contents Customer Assistance For Assistance In The U.S.A Our Thanks ToYouFor Assistance Outside The U.S.A Product Features Microphone Product FeaturesMicrophone With Auxiliary Controls Table Of Contents Always use only Cobra authorized accessories Important Safety Information Important Safety Information Safety Training InformationRecommendations For Marine Communication FCC Licensing InformationVoice Calling VHF Marine Radio ProceduresVHF Marine Radio Procedures Maintain Your Watch Voice CallingDigital Selective Calling DSC Maritime Mobile Service Identity MmsiMaritime Mobile Service Identity Mmsi Digital Selective Calling DSCRadiotelephone Calls Emergency Messages Distress ProcedureEmergency Messages And Distress Procedure Radiotelephone CallsSay Marine Distress ProcedureMarine Distress Procedure DSC Tell where you areVHF Marine Channel Assignments VHF Marine Channel Assignments03A Government Only International Distress, Safety and Calling156.700 Rx Only 156.750 156.800 156.85021A U.S. Government Only Canada Coast Guard Only 20A Port Operations Port Operations, Ship Movement23A Government Only Digital Selective Calling Voice communications not allowed 64A U.S. Government Only Canada Commercial Fishing81A U.S. Government Only Environmental Protection Operations Noaa Weather Channels And Alert World City Time ZonesNoaa Weather Channels Alert World City Time ZonesIncluded In This Package Mounting Powering The RadioMounting And Powering The Radio Included In This PackageMicrophone Bracket Electrical Power ConnectionFlush Mount Kit Not Included Safe Maximum Permissible Exposure MPE Radius Installation RequirementsAntenna Requirements And Attachment Radio Operator RequirementsMicrophone Attachment External Devices ConnectionsExternal Devices And Connections Global Positioning System GPS Device Not IncludedGetting Started Tones And AlarmsPower On-Off Getting StartedStandby And Receive VolumeSquelch LCD Contrast Set-Up Routines Settings MenuSet-Up Routines LCD BacklightA./International/Canada Channel Maps To Set Your Radio For The Area In Which You Will Be Using ItChannels Transmit Power OutputVoice Transmission Voice TransmissionAdvanced Operation Weather Radio And AlertAdvanced Operation Noaa All Hazards/Weather Radio And AlertScan Dual-WatchIf You Incorrectly Enter Your Mmsi Number DSC Set-UpDSC Set-Up User Mmsi NumberGroup Mmsi Number IfYou TransferYourRadioTo a DifferentVesselDSC Scanning To Enter Or Edit Names And Mmsi Numbers In The Directory Position Request Reply TypeIndividual Directory To Set The Position Request Reply TypeDSC Operation DSC OperationSending Distress Calls Receiving Distress Relay Calls Receiving Distress CallsSending An All Ships Calls Regarding Distress Relay CallsReceiving a Geographical Call Receiving An All Ships CallSending An Individual Call Sending a Geographical CallSending a Position Request Receiving An Individual CallReceiving a Group Call Sending a Group CallIf The Station You Called Chose Not To Reply To Exit The Position Request ModeIf You Receive a Position If The Station You Called Cannot Send Its PositionSending a Position Send Receiving a Position RequestReceiving a Position Send Troubleshooting Maintenance TroubleshootingSpecifications MaintenanceProduct Service Optional Accessories Accessories Order Info
Top Page Image Contents