Sight Planning Form For Pub 249 Vol 1
From Almanac Page
UT Date:
DR pos: (degrees only)
UT of Sight
Table 4 GHA 
Day and Hour
Min and Sec
Total GHA 
 360
DR Long ( – West, + East)
LHA
Data for Pub 249
LHA
DR Lat
Civil Twilight upper
lower

 by span btwn ________
 extra DR Lat degrees __
Add to lower for base UT
Longitude 15 (table 3)
Add to base UT for UT of
Civil Twilight at DR
Longitude
Selected Stars From Pub 249
Hc
Zn
Hc
Zn
Hc
Zn
Sun and Moon Sight Form
UT Date:
 
Hs
Index Correction
Subtract Dip
Ha
REF/SD 
HP 
Main Correction 
L-U Correction 
If U- 30’ 
Ho
UT Hrs/Min/Sec
GHA – Day/ Hour
GHA – Min/Sec
v + / corr 
GHA w/ corr
Dec
d + or -/ corr
Dec w/ corr
GHA Total
+ or – 360
Total GHA
AP Long(+ east – west)
Whole LHA
Data for Pub 249
AP Lat (Same/Cont)
Dec (Whole Degree)
LHA
Data from Pub249
Hc
d / Dec Incre
Corr +/Hc w/corr
Ho
Toward/Away
Z
/
Zn
AP Lat / Long


DR Position:




Planet Sight Form
UT Date:
Planet
Hs
Index Correction
Subtract Dip
Ha
Main Correction
Add’l for Mars/Venus
Ho
UT Hrs/Min/Sec
GHA – Day/ Hour
GHA – Min/Sec
v + or - / corr 
GHA w/ corr
Dec
d + or -/ corr
Dec w/ corr
GHA Total
+ or – 360
Total GHA
AP Long(+ east – west)
Whole LHA
Data for Pub 249
AP Lat (Same/Cont)
Dec (Whole Degree)
LHA
Data from Pub 249
Hc
d / Dec Incre
Corr +/Hc w/corr
Ho
Toward/Away
Z
/
Zn
AP Lat / Long
DR Position:
Star Sight Long Form
UT Date:
Star
Hs
Index Correction
Subtract Dip
Ha
Main Correction
Ho
UT Hrs/Min/Sec
GHA  – Day/ Hour
GHA  – Min/Sec
SHA of Star
GHA Total
Dec of Star
GHA Total
+ or – 360
GHA
AP Long (+ east – west)
LHA(whole degree)
Data for Pub 249
AP Lat (Same/Cont)
Dec (whole degree)
LHA
Data from Pub 249
Hc
d / Dec Incre
Corr +/Hc w/corr
Ho
Toward/Away
Z
/
Zn
AP Lat / Long
DR Position:
Star Sight Short Form
UT Date:
Star
Hs
IC
Dip
Ha
Main Corr
Ho
UT Hrs/Min/Sec
Table 4 – Year
Table 4 – Day
Table 4- Min/Sec
GHA 
??  360
Total GHA 
AP Long(+ East
– West
LHA  (whole degree)
Data for Pub 249
LHA 
AP Lat
Data from Pub 249
Hc
Ho
Toward/Away
Zn
AP Lat / Long
DR Pos:
Noon Sight Form – The Sun at LAN
UT Date:
Latitude
Hs
IC
Dip
Ha
SD
Ho
90-Ho
Sun’s Dec
Latitude at LAN
Longitude
LAN UT
LAN at Prime Mer
Hrs…min…sec
Equation of Time
Total hrs min sec
Table 3 “Arc to
Time” = GHA
GHA to Long
W = GHA
E = 360-GHA
DR Pos:
89 - 60
-_______
=
Equator
N
R
U
L
E
S
S
DR – Sun – Eq = (90-Ho) + Sun’s Dec = Lat
DR – Eq – Sun = (90-Ho) – Sun’s Dec = Lat
Sun – DR – Eq = Sun’s Dec – (90-Ho) = Lat
Eq – Sun – DR = (90-Ho) + Sun’s Dec = Lat
Eq – DR – Sun = Sun’s Dec – (90-Ho) = Lat
 12 00 00

min
sec
UT
Hs
UT of last Hs
UT of first Hs
Subtract
2
Add to first Hs
LAN UT
Predict LAN
DR POS _______________________________ UT DATE ______________
Own GHA _____________________________
Sun GHA ______________________________ UT_____________________ (from Almanac)
GHA Diff______________________________
Time Difference (“arc to time” table 3)
_____________________
Predicted time of LAN
_____________________
Calculator Method to Derive Hc and Zn
Note: d = declination
Date
Body
To Derive Hc
d (Deg Min Sec)
Lat of AP
LHA
Sine d (if dec is contrary to
Lat, then label dec neg)
Sine Lat
Sine d  sine lat =
Cos d
Cos Lat
Cos LHA
#
Cos d  cos Lat  cos LHA
Add #
Conv Sine –1
Conv to deg + min = Hc
Note: no d correction is necessary, this is Hc.
To Derive Zn
Sine Hc
Sine Hc  Sin Lat
Sine d – above =
$
Cos Hc
Cos Lat  cos Hc = &
Divide $ / &
Conv Cos-1
Conv to deg  min for Z
Sine LHA See rules for
Zn
See rules below for Zn
If sine LHA < 0, Z = Zn
If sine LHA  0, 360-Z = Zn
Remember: enter Southern Hemisphere declination as
negative.
Hc = sin -1 (sin d  sin lat + cos d  cos lat  cos LHA)
Z = cos-1 (sin d- sin lat  sin Hc)
cos lat  cos Hc
Sight Reduction Form: Universal
DR Position
UT Date
Heavenly Body
Hs
IC
DIP - subtract
Ha
REF/SD ( HP)
Add’l Venus/Mars
+ Main Correction 
+ L-U Correction 
If U, - 30’ 
Ho
UT Hrs/Min/Sec
GHA – Day/ Hour
 for 
SHA for 
GHA – Min/Sec
v + / corr
GHA w/ corr
DEC
d + or -/ corr
DEC w/ corr
GHA
 360
AP Long (add if
east, subtract if west)
LHA
Data for Pub 249
AP Lat
Dec (Whole Degree)
LHA
Data from Pub249
Hc
d / Dec Incre
Corr +/Hc w/corr
Ho
Intercept (T / A)
Z
/
Zn
AP Lat / Long
S C
S C
S C