Before commencing maintenance on radar systems, what must be done to prevent injury?

Ensuring that the system power is off before starting maintenance on radar systems is critical to preventing injury. Radar systems often handle high voltage and emit potentially harmful radiation when powered on. By de-energizing the system, technicians eliminate the risk of electric shock and exposure to radiation, which could cause severe injuries.

While wearing protective gear, organizing tools, and marking hazards are important safety practices, they do not directly mitigate the most immediate risks involved in working with electrical equipment like radar systems. The primary concern is to ensure that the equipment is completely inactive, making it safe for personnel to perform maintenance without necessitating further protective measures against electrical hazards.