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Page Title: How to Reduce a Sunline Using Pub 229, Continued
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How to Reduce a Sunline Using Pub 229, Continued OPNAV  3130/30 ACTION Completed Strip Pub 229 Naut Alm Form Ho Apply  altitude  corrections  to  find. 25° 53.3' GHA(h) Enter  the  GHA  hour  value  from  the 313° 57.7' Nautical  Almanac. Increment   (m/s) Enter  the  minutes  and  seconds  value  from 54.5' the  Nautical  Almanac. Total  GHA Add  GHA(h)  and  Increments  (m/s). 317° 52.2' v/v  corr ENTER  SHA  for  stars  or  planets  only. STARS  and  PLANETS SHA ONLY a  Long  (+E,  -W) Enter  the  assumed  DR  longitude  to  arrive  at 17°  52.2'W (+  -  360°  if  needed) an  even  degree  of  LHA,  add  east  and subtract  west. LHA LHA=  Total  GHA  +  (v/v  or  SHA  for  star 300° 00.0' and  planets)  +E  or  -W  DR  Long. Tab  Dee Enter  the  tabulated  declination  for  07  hours N  4°  17.3' on  the  Sun  column  from  Nautical  Almanac. d#  /  D  Corrn The  d#  is  found  at  the  bottom  of  the  Sun +0.6  /  +0.3' Dee  column;  in  this  case  it  is  +1.0.  It  is assigned  a  +  because  dec  is  increasing. True Dec DR  Lat same  or  contrary The  D  corr  is  found  on  the  Increments  and Corrections  page  for  15m38s.  Look  under the  v  or  d  column  for  the  d#  (1.0)  and record  the  Corrn  value  (0.4).  The  D  Corrn assumes  the  same  sign  as  the  d#. Apply  the  D  Corrn  to  Tab  Dec Enter  the  whole  degree  of  latitude  and determine  if  it  is  named  (N  or  S)  as  True Dec.  In  this  case  lat.  is  N  and  Dee  is  N,  so it is same. N  4°  17.6' N  37°  same We  have  finished  stages  2  and  3  and  can  move  on  to  our  final  stage. 9-25

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