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(5) In latitude 23° 30', the departure made good was 103 miles.

Required the d.long. by parallel sailing. (6) Required the course and distance by Mercator's sailing,

from A to B.

A-Lat. 37° 26' S. A-Long. 24° 13' W.
B-Lat. 29 15 S. B-Long. 3 17 E.

ADDITIONAL FOR ONLY MATE.

(7) 1870, July 23rd. Required A. M. and P. M. tides at

Spithead, Banff, and Greenock. (8) 1870, November 7th, at 6h. 43m. P. M., apparent time at

ship, in latitude 32° 34' N., longitude 23° 13' E., the Sun's magnetic amplitude was W. 7° 32 S. Find the true

amplitude and variation. (9) 1870, March 20th, P. M. at ship, in latitude 50° 10'S.

the observed altitude of the Sun's 1. l. was 15° 40' 20", height of the eye 14 feet, time by chronometer 19d. 19h. 50m. 4s., which was fast 10m. 24s. for mean noon at Greenwich, on the 20th January, and losing daily 45.4. Find the longitude by chronometer.

ADDITIONAL FOR FIRST MATE.

(10) 1870, July 31st, mean time at ship 7h. 19m. A. M.,

in latitude 41° 3' N., longitude 71° 45' W., the Sun's bearing was S. 81° 36' E., and at the same time the altitude of the Sun's l. l. was 26° 30', height of the eye 20 feet.

Find the variation of the compass. (11) 1870, August 10th, A. M. at ship, in latitude by account

43° N., longitude 144° 12 E., the observed altitude of the Sun's 1. 1. near the meridian, South of the observer, was 62° 35' 10", index error + 2' 20", height of the eye 20 feet, time by watch 10h. 56m. 40s., which was 50m. 10s. slow on apparent time at ship, but since the error was determined the d.long. made to the E. has been 15 miles. Find the latitude.

ADDITIONAL FOR MASTER. (12) 1870, February 21st, the observed meridian altitude of

the star Procyon, bearing S., was 29° 46'50", height of the eye 15 feet. Find the latitude.

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(1) Multiply 57 by 13, by common logs. (2) Divide 1243 by 67, by common logs. (3)

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1 NW by W W/ 6 0 N. by E. 11 A point of land in 2 5 9

lat. 50° 22' N. 3 5 7

long. 4° 7' W. 4 5 4

bearing by compass East. 5 6 N.N.E. 1 N.E. by N. IN 6 5 8

Dist. 5 miles. 5 6 8

5 6 9 S.E. 5 2 E.N.E. 3 10

5 0 11

4 8 12

5 0 1 S. S.W. 4 6 W. 1 Variation 24 pts.W. 2

4 5 3

4 5 4

4 4 5 W. by S.

4 6 S. by W. A current set the 6 4 7

ship by compass 7 4 8

E. by S. Å S. 8

4 9 9 N by WZW 5 1 W. 1 Dist. 12 miles from 10 5 3

the time the depar11 5 3

ture was taken to 12 5 4

the end of the day. (4) 1870, March 20th, in longitude 60° 30' W., the observed

meridian altitude of the Sun's 1.l. was 47° 57' 50", bearing S., index error + 2' 10'', height of the eye 10 feet. Find the latitude.

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(5) In latitude 25° 25', the departure made good was 105 miles.

Required the d.long. by parallel sailing. (6) Required the course and distance, by Mercator's sailing,

from A to B.

A-Lat. 5° 27' N. A-Long. 164° 34' W.
B-Lat. 14 34 N. B-Long. 149 56 E.

ADDITIONAL FOR ONLY MATE.

(7) 1870, October 6th. Find the A. M. and P. M. tides at

Harwich, Tay Bar, and Brouershaven. (8) 1870, January 10th, at 5h. 13m. A. M. apparent time at

ship, in latitude 26° 40' S., longitude 65° E., the Sun's magnetic amplitude was E. by N. 1 N. Find the true

amplitude and variation. (9) 1870, May 20th, P. M. at ship, in latitude 19° 46' S., the

observed altitude of the Sun's 1. 1. was 20° 43' 10", height of the eye 19 feet, time by chronometer 20d. 11h. 19m. 40s., which was 3m. 198. fast for mean noon at Greenwich, on February 17th, and losing daily 35.2. Find the longitude by chronometer.

ADDITIONAL FOR FIRST MATE.

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(10) 1870, September 23rd, mean time at ship 8h. 16m. A.M.,

in latitude 35° N., longitude 35° E., the observed bearing of the Sun was E. by N., altitude 1. 1. 27° 6' 30", height

of the eye 15 feet. Find the variation. (11) 1870, October 15th, P. M. at ship, in latitude by account

32° S., longitude 19° W., the observed altitude of the Sun's l. 1. near the meridian, North of the observer, was 66° 24' 10", height of the eye 12 feet, time by watch 11h. 49m. 16s., which was 24m. 14s. slow on apparent time at ship, but since the error was determined the ship has made 30 miles d.long. to the W. Find the latitude by reduction to the meridian.

ADDITIONAL FOR MASTER.

(12) 1870, April 26th, the observed altitude of the star

a Ceti was 59° 47' 20", bearing N., index error + 3', height of the eye 17 feet. Find the latitude.

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(1) Multiply 193 by 26, by common logs.

Divide 476 by 396, by common logs. (3)

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10 11 12

1 E by N IN 1 9 N. E. 21 A point of land in 2 1 7

lat. 58° 39' N. 3 1 6

long. 4° 57' W. 4 1 4

bearing by compass 5 S.E. by E. 25 S. by W. 13 S.E.E. 6 2 5

Dist. 20 miles. 7

2 8 8

3 2
9 N.E. I N. 3 3 E.S.E.

3 4
3 6

37 1 N.N.W. 2 4 N.E. 11 Variation 24 pts. W. 2

2 4 3

2 6 4

2 4 5 N.E. 3 2 E.S.E. 27 A current set the 6 3 4

ship by compass, 7 3 3

WiN. 8

3 7 9 E.S.E. 3 7 S.

Dist. 18 miles from 10 3 5

the time the depar11 3 4

ture was taken to 12 3 4

the end of the day. (4) 1870, April 29th, in longitude 110° 18' E., the observed

meridian altitude of the Sun's l.l. was 40° 30' 20", bearing S., index error + 5' 10", height of the eye 12 feet. Find the latitude,

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(5) In latitude 25° 25', the departure made good was 105 miles.

Required the d.long. by parallel sailing. (6) Required the course and distance, by Mercator's sailing, from A to B.

A-Lat. 5° 27' N. A-Long. 164° 34' W.
B-Lat. 14 34 N. B-Long. 149 56 E.

ADDITIONAL FOR ONLY MATE.

(7) 1870, October 6th. Find the A. M. and P. M. tides at

Harwich, Tay Bar, and Brouershaven. (8) 1870, January 10th, at 5h. 13m. A. M. apparent time at

ship, in latitude 26° 40' S., longitude 65° E., the Sun's magnetic amplitude was E. by N. * N. Find the true

amplitude and variation. (9) 1870, May 20th, P. M. at ship, in latitude 19° 46' S., the

observed altitude of the Sun's 1. 1. was 20° 43' 10", height of the eye 19 feet, time by chronometer 20d. 11h. 19m. 40s., which was 3m. 198. fast for mean noon at Greenwich, on February 17th, and losing daily 3.2. Find the longitude by chronometer.

ADDITIONAL FOR FIRST MATE.

(10) 1870, September 23rd, mean time at ship 8h. 16m. A.M.,

in latitude 35° N., longitude 35° E., the observed bearing of the Sun was E. by N., altitude 1. 1. 27° 6' 30", height

of the eye 15 feet. Find the variation. (11) 1870, October 15th, P. M. at ship, in latitude by account

32S., longitude 19° W., the observed altitude of the Sun's l. 1. near the meridian, North of the observer, was 66° 24' 10", height of the eye 12 feet, time by watch 11h. 49m. 16s., which was 24m. 14s. slow on apparent time at ship, but since the error was determined the ship has made 30 miles d.long. to the W. Find the latitude by reduction to the meridian.

ADDITIONAL FOR MASTER.

(12) 1870, April 26th, the observed altitude of the star

a Ceti was 59° 47' 20", bearing N., index error + 3', height of the eye 17 feet. Find the latitude,

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