Which statement about surveying in the Philippines is NOT true?

The statement regarding the absolute value of meridian convergence being added to the true azimuth if the line is on the east side of the Central Meridian (CM) is inaccurate. In surveying, meridian convergence refers to the angular difference between the true north and grid north at a given location.

When a line is east of the Central Meridian, the meridian convergence is typically subtracted, not added, from the true azimuth to convert it to the corresponding grid azimuth. This is due to the geometrical relationship between the true north direction and the grid north direction, where the convergence angle represents a correction to the azimuth reading.

Understanding the rules around meridian convergence is crucial in geodetic surveying to ensure that measurements are accurately converted between different reference frames. Therefore, the incorrectness of the statement lies in the misunderstanding of how meridian convergence affects azimuth calculations based on the position relative to the Central Meridian.