Final answer:
Use runway designation for transmitting airfield conditions and lighting system NOTAMs to provide precise information about affected areas, ensuring clarity and safety.
Step-by-step explanation:
You should always use runway designation when transmitting airfield conditions and lighting system NOTAMs.
The runway designation provides precise information about which runway is affected.
For example, if there is construction on a specific part of the airfield that affects runway operations, a NOTAM must include the runway number to inform pilots and ground crews.
Similarly, if a lighting system on a certain runway is inoperative, the NOTAM must clearly indicate which runway's lighting is affected.
By using the runway designation, NOTAMs ensure clarity and safety for airport operations.