8 Voice procedure 3: Urgency & Safety calls


Urgency calls Medical advice Safety calls


9 GMDSS Background and principles


52 52 53 54


55 55


Sub-systems involved in GMDSS 55 Navtex EPIRBs


The satellites


Doppler positioning EPIRBs


Stowage and maintenance Registration False alarms SARTs


10 Digital Selective Calling – introduction & routine calls DSC Controllers


Classes of DSC Controller MMSIs


Types of call


DSC controllers and position Using a Class D controller Sending a DSC call


Receiving a DSC individual call Receiving a DSC group call Using a Class A or B controller


56 57 57 58 58 59 59 59 60


11 DSC Distress, Urgency & Safety Definition of distress The Distress alert


After sending a Distress alert Receiving a distress alert


Accidental False Alert procedure Urgency and Safety


67 67 67 68 68 69 70


Sending an urgency or safety call 70 Receiving a DSC urgency or safety call


Mayday relay


Appendix 1: Examination Syllabus for the CEPT Short Range Certificate (SRC)


Appendix 2: Standard Marine Navigational Vocabulary


VHF channel numbers


61 61 62 62 63 64 64 65 65 66 66


GMDSS Sea Areas Index Glossary Membership pages Syllabus item A1.1


Throughout this book you will find red boxes as shown above; these highlight which item of the RYA VHF Course Syllabus the section relates to.


71 71


72 78 82 84 86 89 91


VHF Handbook


5

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