What action is required of a sentry according to the 4th General Order?

The correct response highlights that a sentry, according to the 4th General Order, is required to repeat calls from distant posts. This action is critical for maintaining communication and ensuring that information is effectively relayed throughout the area of responsibility. The ability to repeat calls helps ensure that significant messages or alerts are not missed, promoting overall situational awareness and safety.

In a military context, maintaining clear communication is essential for operational security and effective coordination. Repeating calls from distant posts allows a sentry to act as a relay point, ensuring that necessary information reaches command personnel and other sentries in a timely manner. This helps to prevent misunderstandings or delays in response to alerts, which can be crucial in a variety of situations.

Other choices, while relevant to the responsibilities of a sentry, do not specifically pertain to the 4th General Order. Saluting officers is a matter of military etiquette, notifying the Officer of the Deck (OOD) pertains to direct reporting procedures, and keeping posts clean relates to maintaining the area, none of which are associated with the specific directive outlined in the 4th General Order.