ECDIS : Passage planning and watchkeeping. 

 -  Witherbys Publishing Group ltd,  2019 
 - viii, 186 p. 
<br/><br/>
<br/><br/><label>ISBN: </label>978-1-85609-816-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Merchant mariners -- watch duty.
<br/><br/><label>Dewey Class. No.: </label>M 387.5071 E17 2019