TY  - BOOK
AU  - Burch,David
TI  - Emergency navigation: find your position and shape your course at sea even if your instruments fail 
SN  - 0071481842 (pbk. : alk. paper)
PY  - 2008///
CY  - Camden, Me.
PB  - International Marine / McGraw-Hill
KW  - Navigation
N1  - Includes bibliographical references (p. 250-259) and index
UR  - http://www.loc.gov/catdir/enhancements/fy0814/2007046265-t.html
ER  -