Table selections for use with the Starpath Cel Nav Course · Starpath Celestial Navigation Course Table Selections Selections from the Nautical Almanac and from Sight Reduction Tables

Starpath Celestial Navigation Course

Table Selections

Selections from the Nautical Almanac and from Sight Reduction Tables needed to work practice problems in the course

12/04/03

2 Starpath Celestial Navigation Course

Copyright ©, 2003 Starpath School of Navigation

Table Selections 3


T- 1 ......Nautical Almanac 1978, Jul 24, 25, 26 planets and stars..........................3T- 2 ......Nautical Almanac 1978, Jul 24, 25, 26 sun and moon.............................4T- 3 ......Nautical Almanac 1978, Oct 25, 26, 27 planets and stars ........................5T- 4 ......Nautical Almanac 1978, Oct 25, 26, 27 sun and moon............................6T- 5 ......Nautical Almanac 1981, Mar 26, 27, 28 planets and stars ........................7T- 6 ......Nautical Almanac 1981, Mar 26, 27, 28 sun and moon ...........................8

T- 7 ......Conversion of Arc to Time ..........................................................................9T- 8 ......Altitude Corrections Sun, Planets, Stars .....................................................10

T- 9 ......Increments and corrections 4m and 5m ....................................................11T-10 .....Increments and corrections 6m and 7m ....................................................12T-11......Increments and corrections 48m and 49m ................................................13T-12 .....Increments and corrections 50m and 51m.................................................14

T-13 .....Altitude Corrections Moon, 0° to 35° .......................................................15T-14 .....Altitude Corrections Moon, 35° to 90° .....................................................16

T-15 .....Pub 249, Vol 2 Sight Reduction Tables.......................................................17T-16 .....Pub 249, Vol 2 Sight Reduction Tables.......................................................18T-17 .....Pub 249, Vol 2 Sight Reduction Tables.......................................................19T-18 .....Pub 249, Vol 2 Sight Reduction Tables.......................................................20T-19 .....Pub 249, Vol 2 Sight Reduction Tables.......................................................21T-20 .....Pub 249, Vol 2 Sight Reduction Tables.......................................................22

T-21 .....Pub 249 Corrections to Hc..........................................................................23T-22 .....Polaris Corrections.......................................................................................24

T-23 .....Pub 249, short sections (for problem 6.6).................................................25T-24 .....Pub 249, short sections (for problem 6.6).................................................26T-25 .....Pub 249, short sections (for problem 6.6).................................................27T-26 .....Pub 249, short sections (for problem 5.7).................................................28T-27 .....N(x) Table for Sight Reduction ...................................................................29

Form for solar index corrections ..............................................................................30Emergency Almanac for the Sun ..............................................................................31

CONTENTS

The notation “T-1,” “T-2,” etc, is for cross reference in the course materials. These are not in general use elsewhere



Table Selections 3


T - 1



Table Selections 5


T - 2



Table Selections 5


T - 3



Table Selections 7


T - 4



Table Selections 7


T - 5



Table Selections 9


T - 6



Table Selections 9


T - 7



Table Selections 11


T - 8We have combined the planet data for two years 1978 and 1981 in this table. Normally this table has data for one year only. It is only the planet data that changes on this table from year to year.



Table Selections 11


T - 9



Table Selections 13


T - 10



Table Selections 13


T - 11



Table Selections 15


T - 12



Table Selections 15


T - 13



Table Selections 17


T - 14



Table Selections 17


T - 15



Table Selections 19


T - 16



Table Selections 19


T - 17



Table Selections 21


T - 18



Table Selections 21


T - 19



Table Selections 23


T - 20



Table Selections 23


T - 21



Table Selections 25


T - 22



Table Selections 25


T - 23



Table Selections 27


T - 24



Table Selections 27


T - 25



Table Selections 29


T - 26



Table Selections 29


N(x) TableThis table can be used for several calculations in ce-lestial navigation. Examples are given in Section 11.5 and in the Answers section.

The phrase "C = N(20)" means that C equals the N value that is listed beside x = 20, or C = 1073. The phrase "N(B) =56" means that B equals the x value that is listed beside N = 56, or B = 71 Some applica-tions require interpolation of the table.

This table uses Meridian Angle instead of Local Hour Angle. Meridian angle (t) is defined as: t west = LHA for LHA < 180 and t east = 360 - LHA for LHA > 180.

x N(x) x N(x) x N(x)1 4048 31 664 61 1342 3355 32 635 62 1243 2950 33 608 63 1154 2663 34 581 64 1075 2440 35 556 65 986 2258 36 531 66 907 2105 37 508 67 838 1972 38 485 68 769 1855 39 463 69 6910 1751 40 442 70 6211 1656 41 422 71 5612 1571 42 402 72 5013 1492 43 383 73 4514 1419 44 364 74 4015 1352 45 347 75 3516 1289 46 329 76 3017 1230 47 313 77 2618 1174 48 297 78 2219 1122 49 281 79 1920 1073 50 267 80 1521 1026 51 252 81 1222 982 52 238 82 1023 940 53 225 83 724 900 54 212 84 525 861 55 199 85 426 825 56 187 86 227 790 57 176 87 128 756 58 165 88 129 724 59 154 89 030 693 60 144

T - 27

SIGHT REDUCTION PROCEDURE

Find v from: N(v) = N(90 - dec) + N(t); if t > 90, use t = 180 - t.

Find w from: N(w) = N(dec) - N(90 - v);

Find u from: u = 90 - w + Lat, for same name. u = 90 - w - Lat, for contrary name. If u > 90 (either name), use u = 180 - u.

Find Hc from: N(Hc) = N(90 - v) + N(u).

Find Z from: N(Z) = N(v) - N(90 - Hc); for all contrary names or for same names with original u > 90, use Z = 180 - Z.

This method of sight reduction lies somewhere between a tool for emergency use and a novelty. We developed it for use with an equally short perpetual almanac of the sun. The idea was to have all that is needed for emergency naviga-tion on one small card. We first published this in 1987 and since then (now 2003) we have had exactly zero feedback on its use. That is, we have no idea if anyone has ever used it for any-thing! It remains, however, the world's short-est sight reduction tables that will indeed give accurate results for any sight—which, together with a dollar, will get you a cup of coffee... except maybe in Seattle.



Table Selections 31


Toward or Away Date

On Off Diff Check SD

sight #

SD=

- - += = ÷2 = ÷4

= = Toward or Away Date


sight #

SD=

- - += = ÷2 = ÷4

= =

Toward or Away Date


sight #

SD=

- - += = ÷2 = ÷4



sight #

SD=

- - += = ÷2 = ÷4

= =

Toward or Away Date


sight #

SD=

- - += = ÷2 = ÷4



sight #

SD=

- - += = ÷2 = ÷4

= =

Toward or Away Date


sight #

SD=

- - += = ÷2 = ÷4



sight #

SD=

- - += = ÷2 = ÷4



sight #

SD=

- - += = ÷2 = ÷4



sight #

SD=

- - += = ÷2 = ÷4

= =

Toward or Away Date


sight #

SD=

- - += = ÷2 = ÷4



sight #

SD=

- - += = ÷2 = ÷4

= =

Solar Index CorrectionsForm for doing Index Correction with the sun as described in Sec. 11.6. May be duplicated for use with the course or actual sights.



Table Selections 31


School of Navigation

3050 NW 63rd StreetSeattle, WA 98107

www.starpath.com, [email protected] 206-783-1414 fax 206-783-9209

Table selections for use with the Starpath Cel Nav Course · Starpath Celestial Navigation Course Table Selections Selections from the Nautical Almanac and from Sight Reduction Tables

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