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10.

Green. date Aug. 13d 2h 20m 408; red. decl. 14° 29′ 8′′ N.; true alt. 27° 23′ 29′′;
Variation 15° 30' E.

from noon 32m 18; red. decl. Latitude 15° 46′ S.

sum of logs. 19:259910; true azimuth N. 50° 30′ E. II. Green. date June 11d 19h 43m 30°; time 23° 11′ 21′′ N.; true alt. 50° 14′ 43′′; nat. no. 877. Towson: Aug. I, + 12′ 16′′; index 81; Aug. II, +34' 38". Latitude 15° 47′ 2′′ S. Star's decl. 22° 51′ 41′′ N.; true alt. 60° 23′ 4′′. Latitude 52° 28′ 37′′ N.

12.

EXAMINATION PAPER-No. XVIII, page 258-260.

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3. TRUE COURSES.-S. 1 W., 19'; N. 34 W., 23'7; S. 3 E., 16'3; N. E., 17.6; S. 2 W., 14'1; N. 6} E., 42''3; S. 6 E., 12'; S. 5} W., 15'. Diff. lat. 7'8 S.; dep. 251 E. Latitude in 56° 52′ N.; diff. long. 46′ E. Longitude in 39° 14′ W.; course S. 73° E.; distance 26'.

4. Green. date, June 24d 20h 3m; red. decl. 23° 23′ 46′′ N.; true alt. 60° 4′ 7′′: Latitude 6° 32′ 7′′ S.

5. Diff. long. 153'9 W., or 2° 34' W. Longitude in 12° 4′ W.

6. Diff. lat. 4528.5 N.; mer. diff. lat. 4896'5; diff. long. 3540′ E.; log. tang. 9.859117; true course N. 35° 52′ E. Compass course N. 15° 52′ E.; distance 5588'.

7. oh 8m A.M.; oh 41m P.M.; 10h 43m A.M.; 11h 13m P.M.; 3h 2m A.M.; 3h 35m P.M. 7a. 11h 43m A.M.; no P.M. (Method II.)

red, decl. 17° 59′ 16′′ N.; true amp. Deviation 4° 17′ W.

76. 10h 19m A.M.; 10h 40m P.M. (Method III.) 8. Green. date, May 10d 19h 42m 36a; W. 23° 21′ N. Error of compass 0° 51′ E. 9. Green. date, Sept. 22d 18h 59m 59s; - 7m 46; true alt. 16° 56′ 12′′; hour-angle IO. Green. date, March 21d 13h 51m 16s; red. decl. 0° 42′ 20′′ N.; true altitude 42° 57′ 18′′; sum of logs. 19.619986; true azimuth N. 80° 26' W. Error of Compass 15° 11 E. Deviation 7° 21′ E.

II.

red. decl. 0° 12′ 48′′ S.; red. eq. time 4h 52m 158. Longitude 。°.

Green. date, Oct. 3d 14h 27m 98; time from noon 10m 518; red. decl. 4° 25′ 6′′ S. ; true alt. 63° 47′ 10′′; nat. no. 96. Latitude 30° 30}' S.

Latitude 30° 30' 11" S. Latitude 60° 53′ 6′′ N.

Towson: Aug. I, + o' 18"; index 15. Aug. II, + 8′ 3′′. 12. Star's decl. 55° 49′ 51′′ N.; true alt. 84° 56′ 45". CORRECTED COURSES.-S. 12° W., 19'; N. 50° W., 23'7; S. 47° E., 16'3; N. 18' E., 17'6; S. 8° W., 14'1; N. 87° E., 42′ 3; S. 74° E., 12′; S. 65° W., 15′. Diff. lat. 19''2 S.; dep. 33''2 E. Latitude in 56° 41′ N.; diff, long. 61' E. Longitude in 38' 59' W.; course S. 60° E., distance 38'

EXAMINATION PAPER-No. XIX, pages 260-261.

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2. 6.903505 =0008008. (The quotient.)

3.

TRUE COURSES.-N. 4 E., 21'; S. 6 E., 16''6; S. 3 W., 13'4; N. 1 E., 193; S. 14 W., 19''1; S. 74 W., 47''6; N. 51 E., 21'3; N. 41 E., 49'. Diff. lat. 337 N., dep. 33'0 E.; course N. 44° E.; dist. 47'. Latitude in 62° 54' N.; diff. long. 71 E. Longitude in 63° 28′ W.

4. Green, date, May 31d 21h 1m 20; red. decl. 22° 7′ 26′′ N.; true alt. 72° 28′ 57′′.
Latitude 39° 38' 29" N.

5. Log. of diff. long. 1747719 = Diff long. 55'94.

6. Diff. lat. 3757' S.; mer. diff. lat. 4255'; diff. long. 7560 E.; log. tangent
10'249622; course S. 60° 38' E.; distance 7661.

7, 10h 56m A.M.; 11h 21m P.M.; no A.M.; oh 4m P.M.; 8h 47m A.M.; 9h 18m P.M.
11h 52m A.M.; no P.M. (Method II.)

7a.

7b. 6h 3m A.M.; 6h 36m P.M.

8.

(Method III.)

Green. date, Aug. 9d 8h 46m; red. decl. 15° 36′' 16" N.; true amp. E. 28° 5' N.
Error of compass 39° 25′ W. Variation 27° 55′′ W.

9.

Green. date, Jan. 28d 16h 36 50°; red. decl. 18° 6' 52" S.; rel. eq. time +
13m 16; true alt. 17° 52′ 42′′; hour-angle 3h 46m 33. Long. at sight 170° 44° 45′′ E. ;
diff. long, since 19′ W. Longitude at noon 171° 3′ 45′′ E.

10.

Green. date, June 14d 19h 5m 48s; red. decl. 23° 20' 20" N.; true altitude
Error of compass
29° 35′ 52"; sum of logs. 19'702984; true azimuth S. 90° 32′ E.
11° 36′ W. Deviation 9° 24′ E.

II.

from noon 38m 119; red. decl.
Latitude 6° 24' S.

Latitude 29° 26′ 57′′ N.

Green. date, Nov. 28d 16h 24m 319; time
21° 32′ 46′′ S.; true alt. 72° 15′ 49′′; nat. no. 1280'.
12. Star's decl. 8° 21' 9" S.; true alt. 52° 11′ 54′′.
Towson: Hour-angle exceeds the limits of Table.
13. CORRECTED COURSES.-N. 53° E., 21'; S. 73° E., 16''6; S. 26° W., 13'4;
N. 35° E., 19'3; S. 1° W., 19'1; S. 65° W., 47''6; N. 76° E., 21'3; N. 48° E., 49'
Diff. lat. 10'3 N.; dep. 51'6 E.; course N. 79° E.; dist. 53. Latitude in 62° 30′ N. ;
diff. long. 112' E. Longitude in 62° 48′ W.

EXAMINATION PAPER-No. XX, pages 262-263.

1. 7.891486=77890714.. (By numbers 77890900.)

2.

2'900314794'904. (By numbers 794'901.)

3. TRUE COURSES.-S. 14 E., 14'; S. 7 E., 20'2; N. 3 E., 19''3; S. 73 W.,
14'4; S. E., 19''5; N. 2 W., 29'1; S. 3 E., 25'2; N. 7 E., 39'1. Diff. lat. 3''4 S.;
dep. 67''1 E.; course S. 87° E.; dist. 67'. Latitude in 59° 46′ N.; diff. long. 134.
Longitude in 41° 56′ W.

4. Green, date, Sept. 30d 18h 21m 20$; red. decl. 3° 19′ 8′′ S.; true alt. 56° 56′ 24′′
Latitude 36° 22′ 44′′ S.

5. Diff. long. 369'7 E., or 6° 10' E. Longitude in 21° 18′ W.

N. 61° 29' E., or N.E. by E E. nearly.

Compass course

6. Diff. lat. 2000' N.; mer. diff. lat. 2043'; diff. long. 20° 43′ W.; log. tang.
10'000000; true course N. 45° W. Compass course N. 32° 7′ W.; dist. 2828'.

7. No A.M.; oh 26m P.M.; no A.M.; oh 15m P.M.; 8h 56m A.M.; 9h 29m P.M.;

10h 17m A.M.; 10h 47m P.M.

7a. 11h 51m A.M.; no P.M.
76. 11h 42m A.M.; no P.M.

(Method II.)

(Method III.)

8. Green. date, May 10 19h 42m 20%; red. decl. 17° 59′ 16′′ N.; true amplitude
W. 23° 21" N. Error of compass o° 51′ E. Deviation 4° 17′ W.

9. Green. date, Aug. 24d 6h 16m 568; red. decl. 10° 50′ 9′′ N.; red. eq. time +
Im 59; true alt. 37° 26' 50"; hour-angle 3h 22m 34. Long. at sight 144° 22′ 45′′ W.;
diff. long. 10′ 45′′ W. Longitude at noon 144° 33' 30′ W.

GGG

io. Green. date, Feb. 27d 6h 21m 40s; red. decl. 8° 23′ 1a S.; true alt. 14° 25′ 40′′; sum of logs. 19696064; true azimuth N. 89° 37' W. Variation 13° 41′ W.

II. Green. date, May 29d 9h 58m 28s; time from noon 4m 12; red. decl. 21° 46′ 38 N.; true alt. 67° 53' 11"; nat. no. 16. Latitude o° 19' S.

Towson: Aug. I, + o' 12"; index 2. Aug. II, + 1' 18". Latitude o° 18′ 41′′ S. Star's decl. 6° 49′ 45′′ N.; true alt. 28° 58′ 36′′. Latitude 54° 11′ 39′′ S. 13. Deviation is 28 E.

12.

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EXERCISES ON THE CHART.

FOR ONLY MATE, FIRST MATE, AND MASTER.

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II. The ship is in latitude 55° 59′ N., longitude 2° 40′ E., and must sail S.E. ¦ S. (mag.) 209 miles.

12. The place of meeting was lat. 56° 5' N., long. 3° 11′ E.; the course steered by the ship from Heligoland was N.W. ‡ W. (true), and by the ship from Hartlepool was N.E. by E. E. 13. Lat. 55° 15' N.

Distance 34'

Long. 1° 11' W.

Course S.S.W

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Dist. 21'

English and Bristol Channels, and South Coast of Ireland, pp. 274-275

1. Course S.W. by W.

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N.E. E.

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24. First Course-S.E. by S. (true), or S. by E. (mag.), distance 24 milos.
25. Second
N. by E. (true), or N.E, by N. (mag.), distince 24 miles.

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46

SOUNDINGS.

DEPTHS, &c., page 281.

1. Time from high water 1h 16m; half-range for day 16 feet 8 inches; table B+ 13 feet. Depth of water required 60 fect, or 10 fathoms.

2.

Time from high water 1h 32m; half-range for day 10 feet 8 inches; table B + 7 feet 4 inches. Depth at Fairway Buoy 35 feet 10 inches, or 6 fathoms, nearly. 3. Time before high water 2 52m; half-range for day 12 feet 1 inch; table B+ 10 inches. Depth 26 feet 10 inches, or 41⁄2 fathoms, nearly.

4. Time from high water 5h 51m; half-range for day 8 feet 9 inches; table B 8 feet 8 inches. Depth 24 feet 8 inches, or 4 fathoms.

THOMAS L. AINSLEY, PRINTER, MARKET PLACE, SOUTH SHIELDS.

16, MARKET PLACE, SOUTH SHIELDS,

UNDER THE SUPERINTENDENCE OF

MR. THOMAS L. AINSLEY,

(Author of "A Guide Book to the Local Marine Board," "The Examiner in Seamanship," "A Manual of the Local Marine Board Examinations," &c.

ASSISTED BY EMINENTLY QUALIFIED AND EXPERIENCED TEACHERS.

Captains and Officers of the Merchant Service prepared for passing the Marine Board Examination.

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I. A Course of Navigation, viz:-Latitude by Meridian Altitude of Sun, Moon, and Star £ s. d.
-by Altitude of Sun near the Meridian-by Two Altitudes of Sun-Sumner's Method
of Double Altitudes, and by Altitude of Pole Star out of the Meridian; Variation of
the Compass by Amplitude and Azimuth; Longitude by Chronometer and by Lunar
Observations; and the use of the Sextant and Charts

II. A Course of Navigation, as above, with Plane Trigonometry....
III. A Complete Course of Practical Navigation, including all the Methods employed in
Nautical Astronomy for determining Latitude, Longitude, Variation of the Compass,
Error of Chronometers, &c.; together with Plane and Spherical Trigonometry, and
their application to Navigation and Nautical Astronomy

4 4 0 660

880

Courses of Arithmetic, Algebra, Geometry, Trigonometry, (Plane and Spherical) Surveying, &c. on moderate Terms.

Lessons on Physical Geography, Meteorology, Law of Storms, &c.

OFFICERS OF THE ROYAL NAVY PREPARED FOR COLLEGE EXAMINATION.

Instruction given on the use of all Meteorological, Nautical, and Mathematical Instruments, Charts, &c.

The Fees are paid at Entrance. Persons who cannot stay to complete a Course of Instruction, may return for that purpose, without any additional expense. A separate Apartment for Masters.

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