What must be done before starting work on a MK-21 delay element?

Before starting work on a MK-21 delay element, it is essential to undergo a safety briefing. This approach ensures that all personnel involved are aware of the specific hazards associated with the project and are informed about the safety protocols that must be followed. A safety briefing provides critical information, such as emergency procedures, proper handling techniques, and any specific risks related to the MK-21 delay element, which ultimately promotes a safe working environment.

While reading the manufacturer's manual, obtaining authorization from the Safety Officer, and checking for updates to instructions are all important practices in a comprehensive safety and operational procedure, they do not replace the necessity of a safety briefing specific to the task at hand. The safety briefing directly addresses situational awareness and immediate risks, which is crucial when dealing with munitions and explosive elements.