What type of instructions should not be issued for airfield checks?

Unconditional instructions should not be issued for airfield checks because they require immediate compliance without any conditions or circumstances attached. In the context of airfield checks, it is crucial for air traffic control to ensure that instructions provide clear considerations of the operational environment and the specific conditions under which the checks are being carried out.

Conditional instructions allow for the adaptability and response to the changing circumstances during an airfield check. For instance, if certain conditions are met, the instructions will guide the actions required, enhancing safety and operational efficiency.

Flight plan instructions and standard operating instructions are also tailored to manage air traffic and operations systematically, reflecting the procedures and protocols that ensure safe interactions in the airspace and on the ground. These types of instructions incorporate contingencies and clarifications, facilitating smoother operations and better decision-making processes.

Therefore, while unconditional instructions may be straightforward, they do not offer the flexibility or the necessary context for the dynamic nature of airfield operations, making them unsuitable for issuing during airfield checks.