Which pipes are set at 1245?

Setting pipes at 1245 refers to specific actions and communication protocols that take place at that time within naval operations. The correct answer emphasizes the importance of maintaining safety and readiness in the ship's environment.

Setting Material Condition Yoke involves establishing a minimal level of readiness that allows for the ship to maintain some operational capability while also ensuring that certain compartments are secured against potential flooding or fire. This condition is crucial for protecting both the ship and its personnel and is typically established during the intervals when the ship is not in immediate danger or engaged in active operations.

The reference to "Sweepers" indicates the practice of cleaning and ensuring the general upkeep of the ship's areas. This activity aligns with the need to convey readiness while keeping the environment clean, fostering a sense of responsibility among the crew during routine operations.

In contrast, options like the Noon Meal/Liberty or Evening Meal being served do not specifically mention any readiness condition being established and therefore do not reflect the operational priorities that are set at 1245, which focuses explicitly on material conditions and shipboard cleanliness. Similarly, verifying Material Condition Yoke is more of an evaluative action than an operational directive, which further illustrates why the correct choice focuses on the proactive measure of setting the condition alongside the