In case of flooding, what should be the first pipe announcement made?

The first pipe announcement made in response to flooding should clearly communicate the specific nature of the emergency to ensure that all personnel are immediately aware of the situation. By announcing "Flooding has been reported in (space)," the focus is on informing the crew about the exact location of the flooding. This is crucial for initiating a timely response, such as deploying damage control teams and taking necessary actions to mitigate the situation.

This choice prioritizes immediate awareness and readiness among the crew, which is essential in managing the emergency effectively. The announcement provides specific information that enables crew members to react according to their training, including securing equipment, isolating affected areas, and preparing to assist with damage control efforts. Being informed about the exact location helps to coordinate a swift and focused response.

The other options, while relevant in certain contexts, do not provide the same level of immediate clarity about the situation at hand. Preparing for evacuation or securing machinery may be important steps, but they come after the critical initial awareness of where the flooding is occurring. Communicating that "emergency drills are now in effect" would be inappropriate in a real emergency, as this may confuse the urgency of the situation. Therefore, announcing the flooding disturbance in a specified area is the most appropriate first action.