Admiralty list of radio signals volume 6, part 1 :  pilot services, vessel traffic services and port operations: United Kingdom and Europe (excluding Arctic, Baltic and Mediterranean Coasts). 

 - xx, 460 pages ;  30 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio in navigation.