Admiralty list of radio signals, volume 5 : global maritime distress and safety system (GMDSS). 

 -  The United Kingdom Hydrographic Office.  2010 
 - xviii, 457 pages 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio in navigation.
<br/><br/><label>Dewey Class. No.: </label>M 623.89 Ad6 2010