. Tables of calculated hour-angles and altitude azimuth table 30N. to 30S. : ex-meridian tables 60N. to 60S. and calculated reductions ans azimuths of bright stars from 1 hour to 3 hours from Meridian / c by Blackburne . t. Var. 8-54 s. gives for Plane Chart N. 65° E. (Table VL, p. 270). H. M. Green. 2x x8 4X Sid. Noon 2 26 23-7 Accl. 21 h. iSm. 41 s. +3 27-0+ 3-0 Longitude by Observation of 1 E. Obsd. Alt. (js 33 56 2040 ft. Dip — 6 xo H. M. S. ils 6 2X 44 Cor. -X 38 Sid. T. Green. 23 48 34- 33 50 xoSemidiameter — X5 X5 Cor. 6 20 6 Open the Tables at Lat.
. Tables of calculated hour-angles and altitude azimuth table 30N. to 30S. : ex-meridian tables 60N. to 60S. and calculated reductions ans azimuths of bright stars from 1 hour to 3 hours from Meridian / c by Blackburne . t. Var. 8-54 s. gives for Plane Chart N. 65° E. (Table VL, p. 270). H. M. Green. 2x x8 4X Sid. Noon 2 26 23-7 Accl. 21 h. iSm. 41 s. +3 27-0+ 3-0 Longitude by Observation of 1 E. Obsd. Alt. (js 33 56 2040 ft. Dip — 6 xo H. M. S. ils 6 2X 44 Cor. -X 38 Sid. T. Green. 23 48 34- 33 50 xoSemidiameter — X5 X5 Cor. 6 20 6 Open the Tables at Lat. 28° Decl. 2° N. and transposeL. and D. Vars. 5553iPar. in Alt. )T. Alt. 4s 33 34 55 + 45 7 34 20 2 Decl. 28 5-8 N.+ X-5 Cor. Dec. 28 7-3 N. Lat. 2 0 N. 2 N Decl. 28 7-3 N.^ 28 N Alt. 34 20 34 Position by Chart. Lat. 2 X0-3 46 10-6 E. Gives Cor. E.«s H. M. S. 3 28 9-0-X 46-4 — 3 26 22-6 6 20 6-0 Cor. D. 285 D. 44 41-3x-5 Sid. T. at Ship 2 53 43-4 Sid. T. at Green. 23 48 34-7 -x-5 X + 7-3 = -4-77X +20 = Cor. Cor. — xx-o-95-4 -106-4 = X m. 46-4 s. Long, in TimeLong. 3 5 8-746 17 10E. L. Var. 2-60 s. gives Position-Line forPlane Chart N. 33° W. (Table VI.,p. 270).. Pos? 2 lO-5 N 46 lOB £. xliv EXAMPLES IN THE USE OF THE TABLES EXAMPLE OF FINDING THE ERROR OF CHRONOMETER BY OBSERVATIONS IN ARTIFICIALHORIZON, SHOWING THE USE OF THE ALTITUDE VARIATIONS IN WORKING OUTSEVERAL OBSERVATIONS SEPARATELY. 1913.—On April i6th, at about jh. 10 m. at place. Suppose the following observations tohave been taken at Observation Spot, Suez Dock. Index Error of Sextant — o 34, Lat. 29° 56 3 N.,Long. 32° 33 12 lom. i2-8s. Alt. Diff. H. M. S. o / // . Approximate times at Green, by chronometer 16 59 33 Obsd. Alt. ©(i) 39 38 40 16 59 57-5 = (2) 39 49 20 17 o 23 (3) 40 o 2017 o 47 (4) 40 10 5017 I II (5) 40 21 1017 I 35-5 (6) 40 31 4017 2 o (7) 40 43 20 10 40 11 o10 3010 20 10 30 11 40 Required the error of chronometer M
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