
 Sight Reduction Worksheet for HO-211 Ageton's Tables

            A & B Log's            

     A(t) =____________

 + B(Dec) =____________
 ======================
     A(R) =____________

  - B(Hc) =____________              
  =====================              
     A(Z) =____________ . . . . . Z  =________.__' (_) & (_)

   A(Dec) =____________           Zn =________.__' T
                                               
   - B(R) =____________
   ====================         
     A(K) =____________ . . . . .  K =________.__'(_)

                               +-Lat =________.__'(_)
                               ====================
 B(K~Lat) =____________ . . .  K~Lat =________.__'(_)

   + B(R) =____________
   ====================
    A(Hc) =____________ . . . . . Hc =________.__'

                                - Ho =________.__'
                                  ==============
                                   a =     ____.__ (_) miles

 ----------------------------------------------------------------------------

 Give K the same name as Dec

 Add K and Lat if they are of contrary name. Otherwise subtract
   the smaller from the greater quantity.  K~Lat

 If the meridian angle, t, is greater than 90 deg, take K from the bottom
   of the table.  (bottom is 90 to 180 deg area)

 Always take Z from the bottom of the table,(90-180), except when K is same
   name and greater than Lat, in which case take Z from the top of the table.

 If Lat = N and t = E then Zn = Z
 If Lat = N and t = W then Zn = 360-Z
 If Lat = S and t = E then Zn = 180-Z
 If Lat = S and t = W then Zn = 180+Z
   Lat > 0 is N,  t > 0 is W
   Lat < 0 is S,  t < 0 is E 

 If K is between 82 and 98 degrees then interpolate from A(R) to B(R)

 Hc is below horizon if K~Lat > 90 degree.

 a Intercept: Ho more then Hc, Towards

 Work Sheet from: "Dead Reckoning: Altitude and Azimuth Table"
 Ageton, Arthur A. (Lieut.), USN,   Hydrographic Office, U.S. Navy
 HO-211, Third Edition, 1943

 Use 'Courier New' Font, Size 11, Portrait 
