Campbell, John,  1947- <br/><br/>
GMDSS :  understanding the Global Maritime Distress and Safety System : the new marine radio communication system / 
John Campbell. 
 - Shrewsbury :  Waterline,  1998. 
 - 144 p. :  ill. ;  23 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>1840370106 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Navigation--Safety measures<br/>Radio in navigation<br/>Artificial satellites in navigation<br/>Distress signals
<br/><br/><label>LC Class. No.: </label>VK200