TY  - BOOK
ED  - Command of the Defense Council
TI  - Astro navigation: BR 45(2): admiralty manual of the navigation, Vol. 2
SN  - 1870077652
U1  - 623.89 
PY  - 2004///
CY  - London
PB  - The Nautical Institute
KW  - Navigation
KW  - Nautical astronomy
KW  - Admiralty
N1  - The celestial sphere
introduction
Time systems
Practical sights : planning, taking, reducing and plotting
The celestial sphere
definitions, hour angles and the theory of time
Identification of heavenly bodies, astronomical position lines, observed position and sight reduction procedures
Meridian passage and Polaris
The rising and setting of heavenly bodies
Refraction, dip and mirage
Errors in astronomical position lines
Appendix 1. The sky at night
Appendix 2. Extracts from the Nautical Almanac (1997)

ER  -