What is set when there is a fire or flooding involved?

The correct answer is material condition zebra. This condition is specifically set on a vessel when there is a fire or flooding situation. The primary purpose of material condition zebra is to maintain maximum watertight integrity and minimize the spread of fire or water throughout the ship. When zebra is enforced, access to certain areas may be restricted, and doors, hatches, and scuttles are secured to prevent the ingress of water or smoke, thereby protecting personnel and vital equipment.

Material conditions serve different purposes in maritime operations. For instance, condition delta is used during general quarters to enhance damage control readiness under conditions of heightened alert. Condition alpha is a general, routine status that allows for normal operations and does not prioritize watertight integrity to the same extent as zebra. Material condition crest is not a standard designation and is not associated with firefighting or flooding scenarios. Therefore, material condition zebra is the appropriate choice for situations involving fire or flooding.