TY  - BOOK
TI  - Astro navigation: the admiralty manual of navigation volume .2. 
U1  - 527 23
PY  - 2018///
CY  - london
PB  - nautical Institute
KW  - Navigation
N1  - CHAPTER 1     The celestial sphere-introduction
CHAPTER 1 Time systems
CHAPTER 1 Practical sights: planning, taking reducing and plotting
CHAPTER 1 The celestial sphere-definitions, hour angles and theory of time
CHAPTER 1 Identification of heavenly bodies, astronomical position lines, observed position and sight reduction procedures
CHAPTER 1 The rising and setting of heavenly bodies
CHAPTER 1 Refraction, dip and mirage
CHAPTER 1 Errors in astronomical position lines
CHAPTER 1 The sky at night 
CHAPTER 1 Extracts from the nautical almanac{1997}
ER  -