voyage report
1.GMDSS application of communication service permeate through naval vessel global oceangoing voyage command communication and naval vessel communication all respects of system already,play its important role,combine several fleet visit,global oceangoing voyage practice of communication,to international GMDSS file books that radio operator should know,how about of Signals use Admiralty list of Radio,is it get into danger to raise,urgent report,pirate attack communication capacity odd explore,in order to improve the validity of international communication capacity.
