Precautionary landing

I'm now exercising precautionary landing. It is different from forced landing in which we have to land as soon as possible in case of emergency to the airplane. In the exercise of precautionary landing, it is assumed that something happened which is not emergent but makes it difficult to continue flying to the destination, such as the passenger getting sick, the weather conditions getting bad, or electrical damage to the airplane, for instance. In the exercise, we have to choose the best field to land considering the obstacles, wind, length, surface, and slope. We fly in a virtual circuit above the chosen field and inspect it from 500 feet above the ground. The surface conditions are assumed by the color of the field; light brown is the best color meaning dry mud field. Light green means low weeds, dark green means tall plants, and dark brown means wet conditions. In the Canadian regulations, we don't actually have to land for the practice and we do overshoot at the minimum height of 500 feet. The most difficult thing in this practice is that we have to control the airplane so as to fly on a virtual rectangle flight course. I need more practice.