Derrick, David <br/><br/>
Navigation for Offshore and Ocean Sailors 

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 - Newton Abbot  David & Charles  1981 
 - 144 p.   
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<br/><br/><label>Subjects--Index Terms: </label>Navigation for Offshore and Ocean Sailors 
<br/><br/><label>Dewey Class. No.: </label>623. 8