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Altitude  Corrections,  Continued - 14221_278
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How to Reduce a Sunline Using Pub 229 - 14221_280
Altitude Corrections, Continued Strip  Forms The  OPNAV  Strip  Form  3530/30;  H.0  229;  Nautical  Almanac  are  used to  reduce  sights  for  stars,  planets,  the  Sun,  and  the  Moon.  The  altitude corrections  for  each  are  the  same  except  an  additional  correction  is required  for  the  Moon  and  planets.  Reducing  sights  using  this  strip form  is  a  process  that  can  be  broken  down  into  the  following  stages: Stage Description 1. Applying  altitude  corrections  to  find  Ho  (height  observed). 2. Using  GMT  to  find  LHA  to  enter  Pub  229  with. 3. Finding  True  Dee  to  enter  Pub  229  with. 4. Entering  Pub  229  to  find  total  corrections  to  apply  to  Ho  to  find Hc  (height  computed)  Intercept,  and  Zn. Steps  to  Follow   Use  the  following  table  to  find  Ho  for  any  celestial  body.  Since  we  will to Find Ho be  working  several  example  problems,  refer  back  to  this  table  to  find Ho. Strip  Form Example  problem  to  find  Ho Complete Pub  229  Naut Strip Alm Form  Pub Action 229  Naut Alm Body Enter  the  symbol  of  the  body. SUN GMT Enter  the  GMT  of  the  actual  sight. 09 15 38 IC Enter  the  value  of  the  index  correction. - 1.0 D Enter  the  dip  correction  (height  of  eye)  from - 6.9 the  inside  cover  of  the  Nautical  Almanac. Sum Total  the  IC  and  D  correction. - 7.9 hs Enter  the  uncorrected  sextant  altitude  from  the 25° 46.9' sight. ha Apply  the  sum  to  hs. 25° 39.0' Alt  Corr Use  ha  to  enter  the  altitude  correction  tables  of + 14.3’ the  Nautical  Almanac. Add'l   Corr Add  any  additional  corrections  for  the  Moon  or N/A Moon  Hp/corr planets. Ho Apply  altitude  and  add'l  corr  to  ha. 25° 53.3' 9-23

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