What is typically secured under the Modified Zebra condition?

The Modified Zebra condition is important in maritime operations, particularly for maintaining vessel safety during certain situations, such as when in a combat environment or during potential flooding scenarios. Under this condition, specific precautions are taken to enhance the vessel's resilience to water ingress.

Typically, the security of additional watertight doors and hatches is emphasized. The rationale behind this is that watertight doors and hatches serve as crucial barriers against water entering the ship, and their proper closure helps maintain the vessel's integrity and buoyancy. By ensuring that these additional barriers are secured, the likelihood of flooding can be minimized, thereby ensuring the safety of the crew and the stability of the ship during adverse conditions.

Other choices, such as keeping all hatches open or focusing solely on main access hatches, do not align with the purpose of the Modified Zebra condition, which prioritizes protection against potential flooding situations rather than accessibility. Non-watertight doors are also not a focus of this condition, as they do not provide the necessary protection against water ingress during critical situations.