When is the ZEBRA condition set onboard?

The ZEBRA condition is a specific readiness status used onboard ships to ensure heightened security and safety, particularly during perilous situations like entering or leaving port in wartime. When the ZEBRA condition is set, it indicates that the ship is preparing for potential threats, necessitating increased vigilance and measures to protect the crew and vessel from enemy actions.

During wartime, entering or leaving port can expose the ship to various risks, including attack or sabotage. Thus, implementing the ZEBRA condition is critical at these times, ensuring that all necessary precautions are taken, such as securing entrances, reducing visibility, and preparing for potential emergencies.

The other scenarios do not align with the critical security implications that the ZEBRA condition addresses. Daily drills focus on routine training, cleaning the engine room is a maintenance task unrelated to security readiness, and while absence of officer supervision could lead to safety issues, it does not specifically relate to the ZEBRA condition's purpose and protocol.