Sweet, Robert J. <br/><br/>
GPS for mariners / 
Robert J. Sweet. 
 - vi, 170 pages. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0-07-141075-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Artificial satellites in navigation.<br/>Global Positioning System.