Admiralty list of radio signals :   pilot services, vessel traffic services and port operations North America, Canada and Greenland.  

 - United Kingdom :   The United Kingdom Hydrographic Office ,   2011 
 - xx, 316 pages, volume 6 :   color illustrations ;   30 cm.  
<br/><br/> Includes Index.  
<br/><br/><label>ISBN: </label>9780707719658 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio Signals<br/>Marine Navigation.
<br/><br/><label>Dewey Class. No.: </label>623.8922  / A1