Final answer:
The recommended method of scanning for other aircraft during the day is using visual scanning techniques.
Step-by-step explanation:
The recommended method of scanning for other aircraft during the day is using visual scanning techniques. This involves visually searching for other aircraft by looking out of the cockpit windows and scanning the sky in a systematic pattern. Pilots should frequently scan the sky in different directions, using their peripheral vision to detect any aircraft that may be approaching or in their vicinity. This method allows for greater situational awareness and helps to prevent potential collisions.