Conditional instructions are those that take effect only if a specific condition occurs. When an arrival aircraft is on the runway, that movement can be unpredictable and outside direct control. Tying an instruction to that movement means it may not trigger as expected, could be misunderstood, or arrive at an unsafe moment, which makes timing and sequencing uncertain. For safety and clarity, you avoid issuing conditional instructions that depend on the arrival traffic’s actual movement on the runway. Use clear, unconditional instructions or other instruction types you can verify and enforce without waiting for a contingent event.

Clear identification of the departing aircraft before issuing instructions is essential so the right airplane receives the clearance and pilots understand exactly who is being addressed. The standard practice is to address the aircraft by its call sign, or by its tail number (registration) if a call sign isn’t available, and then give the clearance. This ensures unambiguous communication in busy airspace and prevents confusion between multiple aircraft. Using a generic label like “aircraft” doesn’t tie the instruction to a specific airplane, and relying only on the controller’s own call sign or giving just a flight number without a clearance would fail to identify the intended aircraft and omit the required instruction.

Flight Data handles flight plan information and communicates directly with Flight Service Stations. When a pilot at Academy Tower wants to close a VFR flight plan, Ground Control passes that request to Flight Data, which then relays it to FSS to officially close the plan. The other positions – Local Control, Tower, and the general Ground Control role – manage aircraft movements and clearances within their airspace, not the process of notifying FSS about closing a flight plan.

Providing additional services is limited by how busy the controller is. The controller must always prioritize higher-priority duties, ensure safe separation, and handle tasks within the capabilities of the radar equipment and the number of aircraft in the airspace. When workload is high, there isn’t enough capacity to add nonessential services without risking safety, so extra services are curtailed. Weather conditions, time of day, or pilot experience can influence operations in various ways, but they don’t determine the ability to take on extra services the way overall workload does.