Which of the following is NOT a requirement for magazine hatches and doors?

The assertion that all magazine hatches must be airtight is not a requirement. While magazine hatches are designed to ensure the safe storage of explosives and minimize the risk of fire or explosion, making them airtight is not explicitly necessary. The primary focus of hatches and doors on an aircraft carrier is to ensure security, safety, and easy access for personnel managing munitions while adhering to operational protocols.

In contrast, the other aspects mentioned relate to essential safety and operational procedures. For example, making magazine doors open inward helps prevent them from being blown open by an explosion and helps maintain pressure differentials. Clearly marking all doors is critical for navigation and ensuring that personnel can quickly identify and access magazines, especially during emergency situations. Having the capability to lock doors from the inside enhances security and control, allowing personnel to secure themselves during potential incidents.