What element is NOT required when issuing holding instructions?

When issuing holding instructions, the elements that are essential typically include the holding fix or waypoint, the direction of holding, and the radial or course for entry and holding pattern. Among these, the specific type of aircraft is not required information for providing holding instructions.

The holding fix or waypoint identifies the geographical location where the aircraft will hold, while the direction of holding indicates whether the aircraft should hold left or right around the fix. The radial or course provides guidance on how the aircraft will enter the holding pattern and maintain its position.

While knowing the aircraft type can be beneficial for providing tailored instructions or when considering specific operational requirements, it is not a necessary element when simply issuing the actual holding instructions. Thus, the absence of the aircraft type from the required elements does not affect the clarity or correctness of the holding instructions being communicated.