USPS SIGHT REDUCTION FORM (click here for help) Name  
SR 96a
  Squadron

TIME

Date    
WT   - -
WE     -
ZT   - -
ZD        
UT   - -
G Day/Month    

SIGHT DATA

Sight No.
Body    
DR L ° ´
DR Lo ° ´

ALTITUDE

Ht of eye ft
hs ° ´
  ( + ´ ) ( - ´ )
IC
 
Dip
 
Total
 
Corr
 
ha ° ´
(moon only) HP ° ´
  ( + ´ ) ( - ´ )
Main
 
Add´l, Pl
 
UL´-30.00´
 
Add´l, Ref
 
Total
 
Corr
 
ho ° ´

ALMANAC --- LHA

SHA * ° ´
hr   ° ´
min sec ° ´
v ( )  ´
v corr ( )   ´
Tot GHA ° ´  
Dr Lo ° ´
LHA ° ´  

ALMANAC --- Dec

Dec hr ° ´
d ( ) ´
d corr ( )   ´
Dec ° ´

INTERCEPT and AZIMUTH by the LAW of COSINES METHOD

Enter Lat as positive.
If Lat/Dec contrary name
enter Dec as negative.
Convert LHA, Lat, and Dec to
5 place rounded decimal degrees.
Round Zn to whole degrees. 		LHA ° ´   -----> LHA °
Lat ° ´ -----> Lat (+) °
Dec ° ´ -----> Dec  °

( cos LHA x cos Lat x cos Dec ) + ( sin Lat x sin Dec ) = sin Hc °
( sin Dec - ( sin Lat x sin Hc ) / ( cos Lat x cos Hc ) = cos Z °

Hc ° ´     
Ho ° ´ Ho > Hc...toward
a nm   Hc > Ho...away     Zn °