Question 33Navigation General

The correct answer is B) latitude scale near the middle of the track line. On a Mercator chart, distance along a track line is measured using the latitude scale near the middle of the track line. This is because the Mercator projection distorts distances and areas, and the latitude scale provides the most accurate distance measurement along the track line. The other options are incorrect because the longitude scale does not accurately represent distance (option A), using the latitude or longitude scale at the middle of the chart would not account for the distortion along the track line (option C), and using the latitude scale at the mid-latitude of the chart would not be as accurate as using the scale near the middle of the track line (option D).