How many mils are on a compass?

The correct answer is that there are 6400 mils on a compass. This is based on the concept of the mil, which is a unit of angular measurement commonly used in military applications, especially in artillery and navigation. One full circle is divided into 6400 units (mils), which allows for more precise measurement of angles compared to degrees.

The use of 6400 mils enables easier calculations when converting between distance and angular measurements, particularly because these calculations are often done when aiming or setting up artillery and other equipment that requires highly precise orientation. This system also aligns with the metric system, facilitating its use in various tactical and operational environments.

In comparison, the other values represent different systems or divisions. For instance, 360 degrees equals one full rotation, while 4000 mils is an outdated standard. The mil system provides more granularity and is specifically designed for the needs of military applications, hence the use of 6400 mils in most contemporary compasses.