What does VO stand for in the context of unmanned aircraft operations?

In the context of unmanned aircraft operations, VO stands for Visual Observer. A Visual Observer plays a critical role in maintaining situational awareness and safety during flight operations. Their primary responsibility is to visually monitor the unmanned aircraft (UAS) and its surroundings to ensure that it operates within the established visual line-of-sight requirements and to help avoid potential obstacles and other aircraft.

The use of a Visual Observer is especially important when the UAS pilot may not have full visual coverage due to the UAS flying behind obstacles or features, such as buildings or trees. By having a Visual Observer, who can provide additional eyes on the operation, the overall safety and effectiveness of the flight can be greatly enhanced. Other terms like Vertical Operator, Vehicle Operator, or Visual Orientation do not pertain specifically to the established terminology and roles defined by the FAA for UAS operations.