
 HO-211 Sight Reduction Worksheet
 
                                                                     AZIMUTH
                           ADD           SUBTRACT        ADD         SUBTRACT

 t = _____._'(_)  A(t)  =_______

Dec= _____._'(_)  B(Dec)=_______  A(Dec)=_______
                          =======
 R  . . . . . . .  A(R)  =_______  B(R)  =_______  B(R)=_______   A(R)=_______
                                          =======
 K = _____._'(_) . . . . . . . .  A(K)  =_______

Lat= _____._'(_)
     ========
K~L= _____._'(_) . . . . . . . . . . . . . . .  B(K~L)=_______
                                                        =======
Hc = _____._'  . . . . . . . . . . . . . . . .  A(Hc) =_______  B(Hc)=_______
                                                                       =======
Ho = _____._'                                                   A(Z) =_______
     ========
 a = ______._ (_) miles                                    Z = (_)_____._'(_)

                                                           Zn =   _____._' T

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

 Give K the same name as Dec

 K~L: Add K and Lat, if contrary name.
      Subtract smaller from larger, if same name.

 If t > 90 then take K from bottom of table (90-180).

 Take Z from bottom of table (90-180) except when K is same name as Lat and
    greater than Lat, then take Z from top of table (0-90).

 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.

 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 'Terminal' Font, The MSDOS Font, Size 9 or 11, Portrait
