What action should sailors take when crossing the mess deck?

When sailors cross the mess deck, the proper action is to always uncover. This practice is rooted in naval customs and courtesies, which emphasize respect for the dining area as a place of gathering and nourishment. Uncovering—removing a hat—while in the mess deck is a sign of respect and contributes to the overall atmosphere of professionalism within the mess.

In naval tradition, the act of uncovering in dining areas is a customary way to show honor to the setting and its purpose, allowing sailors to participate in the communal experience of mess time without the formality of headgear. This action reflects the importance of the mess deck as a space for fellowship and camaraderie among sailors.

This does not mean that the other options fit within the appropriate norms for behaviors aboard a ship. However, the key takeaway is that uncovering while crossing the mess deck is a gesture of respect aligned with naval traditions.