How many VS-17 panels are required to mark the code letter during daytime?

The correct answer is nine VS-17 panels are recommended to adequately mark the code letter during daytime. This is based on established standards for visibility and recognition in aerial operations.

Using nine panels ensures that the code letter can be seen from a sufficient distance and in various lighting conditions, which is crucial for successful identification by jumpers and aircraft. The structured arrangement and color contrast of the panels create an effective visual signal, making it easier for aircrews to recognize the designated area quickly.

The requirement for nine panels is rooted in practical considerations for safety and operational effectiveness, maximizing the likelihood that the intended message is observed by those in flight. This number is specifically chosen to enhance visibility without overcrowding the marking area, maintaining clarity for the jump operation's logistical needs.