Essential seamanship / 
edited by 3G E-learning LLC, USA.  
 - USA :  3G E-Learning LLC,  2017.  
 - xii, 278 p. :  ill. col. ;  24 cm. +  1 CD-ROMs (4 3/4 in.) 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781680955132  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Boats and boating.<br/>Seamanship.