When is the 'zebra' condition typically set?

The 'zebra' condition is typically set during general quarters, which refers to the heightened state of readiness that a ship enters during a potential emergency or combat situation. At this time, the ship's crew is prepared to respond to threats, and various safety and security measures are activated, including establishing control over access points and ensuring that door and hatch closures are secured to compartmentalize the ship.

Setting the 'zebra' condition is crucial for minimizing damage and maintaining the ship's integrity during an emergency. This procedure enhances the ship's survivability by controlling flooding and fire spread within defined compartments. It emphasizes the importance of being prepared for rapid response, forming a critical part of damage control practices. During other contexts, such as when the ship is docked, during routine drills, or while loading cargo, the threat level is significantly lower, and the urgency of the 'zebra' condition is not present. Thus, general quarters is the most appropriate time for implementing this condition.