NAVTEX manual. 

 - 2012 edition, Fifth edition. 
 - London  IMO  2012 
 - vi, 53 pages :  illustrations, maps ;  21 cm 
<br/><br/><label>ISBN: </label>9789280115628 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Navigational warnings, Special.<br/>Notices to mariners.<br/>Radio in navigation.