NAVTEX manual 

 - 7th 
 - London  IMO - International Maritime Organization  2023 
 - iii, 50p. 
<br/><br/><label>ISBN: </label>9789280117509 
<br/><br/><label>Subjects--Topical Terms: </label><br/>NAVTEX message technical characters<br/>Language and national broadcast options<br/>Message content
<br/><br/><label>Dewey Class. No.: </label>623.8  / IMO