Most of the exercises use canonical units, ie. units scaled so that the magnitude of time and distance is near 1. Aerospace has always used nautical miles (not

Most of the exercises use canonical units, ie. units scaled so that the magnitude of time and distance is near 1. Aerospace has always used nautical miles (not statute miles) and thousands of feet to measure distance on earth. I am from an European, metric country, and I didn't have any issues with BMW.