32 Обсервация с двумя компасными пеленгами 2

A Fix can also be obtained by combining a compass bearing and a visual range. Assume your course is 360° degrees, or North, and your speed is 7 knots. While looking at the nautical chart you spot the lighthouse A and the range marks B and C. While waiting for the two range marks B and C to come visually in line, go to the nautical chart and connect them with a line, draw the first LOP, crossing the course line. Observe the two range marks, and as soon as they are in line, write down the time, let&say 0930 hours, and immediately take a bearing on lighthouse A using the hand held compass. let&assume that after applying the variation correction the lighthouse bearing is 045° degrees true bearing. Place the parallel ruler on the compass rose at the 045° degree line and transfer that line passing from lighthouse A and crossing the course line. As you can now see, the lighthouse bearing crosses the pre-drawn LOP of the range marks. This point of crossing represents your fix position at 0930 hours.