Admiralty list of radio signals : global maritime distress and safety system ( GMDSS) : NP285 - volume 5  

 - United Kingdom  UK Hydrographic Office  2020 
 - xxii,490p. 
<br/><br/><label>ISBN: </label>978077747026 
<br/><br/><label>Dewey Class. No.: </label>623.8  / UKH