Solution of the preceding Questions. (1.) By True Chart, to Points, Degrees and Minutes. Dungeness to Cape Alprech. True course SE by E & ES 60° 28'E W By Magnetic Chart, to Points and Degrees. Magnetic course SE S = S 42°E (2.) By the True Chart, to Points, Degrees and Minutes. NW = N 1° 24'W 7 30 E (3.) Varne Compass bearings EN=N88° 36'E, By the True Chart, to Points, Degrees and Minutes. and N by EE= N21° 6'E 7 30 E By Magnetic Chart, to Points and Degrees. Varne compass bearings EN = N 89°E, and N by EEN 21°E (4.) Find the course to steer by compass from Dungeness to Cape Alprech, (see question 1) to counteract the effect of a current which set SW & W true, or WSW magnetic, at the rate of 3 miles per hour, the ship making by log 9 miles per hour; also the distance the ship would then make good per hour towards Cape Alprech? SOLUTION OF THE PRECEDING QUESTION. (4.) Draw the figure as in the preceding examples, then By The True Chart, to Points, Degrees and Minutes. True course from B to C, E by S=S78° 45'E Variation from chart W N S 18 25 W to right E Distance AC = 7 miles made good per hour from Dungeness towards Cape Alprech. EXERCISES. FOR ALL GRADES WHERE THE CHART IS USED. (1.) Using deviation card No....... Find the course to steer by compass from the South Foreland High Light House to Calais Pier End; also the distance? Answer. Compass Course S 49° 38′ E, or SE } E. (2.) With the ship's head on the above named compass course, Dover Castle, bore, W by NN, the South Sand Head Light Ship bore NE & N by the same compass; find the ship's position? Answer.-Latitude 51° 6' N (3.) With the ship's head as above the South Sand Head Light Ship bore by compass E by N N and after continuing the same course 53 miles, it bore N by W W; find the position of the ship, and her distance from the Light Ship at the time of taking the second bearing? Answer.-Latitude 51° 43′ N ADDITIONAL FOR MASTERS. (4.) Find the course to steer by compass from the South Foreland to Calais (see question 1,) to counteract the effect of a current, or tide, which set SW S true, SW by W magnetic, at the rate of 2 miles per hour, the ship making by log 11 miles per hour; also the distance the ship would then make good per hour towards Calais ? Answer.-Compass Course S 70° 12' E, or E by S & S II. EXERCISES IN EXAMINATION IN CHART. FOR ALL GRADES WHERE THE CHART IS USED. (1.) Using deviation card No....... find the course to steer by compass from the South Foreland to Dungeness; also the distance? Answer.-Compass Course S 84° 38' W; or W S Distance Deviation 20 miles (2.) With the ship's head on the above named compass course the South Foreland High Light House bore by compass E by NN, and the Varne Light Ship bore S by WW by the same compass; find the ship's position? Answer.-Latitude 51° 14′ N (3.) With the ship's head as above, the Varne bore by compass SW, and after continuing on the same course 7 miles, it bore SEE; find the position of the ship, and her distance from the Varne at the time of taking the second bearing? (4.) Find the course to steer by compass from the South Foreland to Dungeness (see question 1,) to counteract the effect of a current which set SW by WW magnetic or SW W true, at the rate of 3 miles per hour, the ship making by log 8 miles per hour; also the distance the ship would then make good per hour towards Dungeness? Answer. Compass Course S 88° 57'; or W S FOR ALL GRADES WHERE THE CHART IS USED. (1). Using deviation card No....... find the course to steer by compass from Cape Alprech to Dungeness; also the distance? Answer.-Compass Course N 27° 3' W, or NNW & W Distance Deviation 26 miles 15 O W (2.) With the ship's head on the above named compass course Cape Grisnez bore E by N, and the Varne Light Ship bore by the same compass NE; find the ship's position? |