[quote=Capt. Lee;25941]Latitude. Round it to the nearest whole number.
Find your Declination
Find your t angle = GHA
+m & s
W-/E+ +/- longitude
This will give you your LHA. If it is more that 180 the subtract 360 and your t angle is east. If this number is less than 180 the LHA is t angle and it is W. If you subtract upside down the t-angle is east. ALways make sure to go to the nearest Observed Longitude to make LHA a whole number.
Sto 3 t-angle
Subtract if lat and declination are contrary add if Lat and dec or the same
rcl1 cos x rcl2 cos x rcl3 cos +/- rcl 1 sin x rcl 2 sin = 2nd sin = HC
sto2 DEC (make this negative if lat and dec are contrary)
rcl2sin -(rcl1 sin x rcl3 sin) = divide rcl1cos divide rcl3 cos = 2nd cos = Z
If take lat north or south and t angle east or west
SW 180+z = ZN
NW 360 - Z = ZN[/quote]
The easiest way I can remember if “t” is E or W is that if it is a morning shot “t” is east and an evening shot “t” is west (the sun rises in the east and sets in the west)