The Examiner marks four positions, A, B, C and D, on the same chart that is used in "Sumner's Method," and requires the candidate to answer the questions that are given in the following form: : FOR ALL GRADES WHERE THE CHART IS USED. (a.)-Using Deviation Card No. 1, find the course to steer by compass from A to B, also the distance. Answer.-Compass course. Distance..... SW W 45 miles 25° W. (b.)—With the ship's head on the above-named compass course C bore by compass WN, distant 14 miles; find the Lat. and Long. of the ship when it was on that bearing. Answer.—Latitude........................ (c.)-With the ship's head as above D bore E also E bore SSEE by the same compass. Answer.-Latitude.................... 49° 24′ N 3 38 W. by compass NE by E Find the ship's position. Signature, WILLIAM DIXON. Date, 1880, March 30th. 49° 8 N SOLUTION OF THE PRECEDING QUESTIONS. Lay an edge of a parallel ruler over the positions A and B, then move the ruler parallel to the line through them until an edge pass through the centre of the compass, the point of the compass coinciding with the edge of the ruler, shews the true course from A to B. Then proceed as follows: a. True course from A to B, S by W=S 11° 15′ W. 25 0 W; allow to right hand. S 36 15 W SW & S. 11 15 W; allow to right. S 47 30 W=SW | W. b. Compass bearing of C, WN N 84° 23' W. Deviation same as in a 11 15 W; allow to left. 25 0 W; allow to left. N 120 38 W. 180 0 S 59 22 W. SW by WW. Compass bearings bearings of Deviation same as a Magnetic bearings NE by EEN 59° 4′ E; SSE & ES 30° 56′ E. Variation same as in a True bearings... or NOTE 1.-Questions b and c are given with the ship's head on the compass course, as it is found by Question a; hence the deviation as found by question a will not be altered, and therefore may be used in Questions b and c. The candidate may, if he choose, use the deviation from the right side of the card, for Questions b and c, thus : NOTE. 2.-There is a slight difference between the deviations, as found by the two methods, arising from the deviations in the Table being only given to the whole points and the nearest whole degree, but this difference is of no practical importance. NOTE. 3.-Should the course be altered in Questions b and c, then their deviations must be taken out of the right side of the card, thus : : |