This new edition explains the GMDSS rules, regulations and procedures. The book contains the regulations drawn from the International Telecommunication Union (ITU) and it is a useful teaching aid for GMDSS topics thoroughly updated to explain: significant changes in operating procedures to GMDSS, improvements to communication equipment and the new opportunities they provide, including: Automatic Identification Systems (AIS), Inmarsat Fleet services amendments to GMDSS radio maintenance certificate. Also expanded to include sections on use of radio for: piracy and armed robbery attacks at sea, medical advice and assistance, Mede Vac; and contains updated and extended contact details of important organisations relevant to GMDSS.