UK Hydrographic Office <br/><br/>
Admiralty list of radio signals : Vol.1-Part-1 

 - 2020 
 - United Kingdom  UK Hydrographic Office  2020 
 - xviii, 324p. 
<br/><br/><label>ISBN: </label>9780707747019 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Radio in navigation<br/>Aids to navigation<br/>Cipher and telegraph codes
<br/><br/><label>Dewey Class. No.: </label>623.8932  / UKH