Hobbs, Richard R. , <br/><br/>
Marine navigation :  piloting and celestial and electronic navigation / 
Richard R. Hobbs. 
 - 4th ed. 
 - xvi, 677 pages :  illustrations ;  26 cm. 
<br/><br/><label>ISBN: </label>1557503818 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Navigation.<br/>Pilots and pilotage.<br/>Nautical astronomy.
<br/><br/><label>LC Class. No.: </label>VK555   / .H62 1998