What does "Action" command notify the gunner of?

The "Action" command serves as a critical notification to the gunner regarding the presence of a threat. This command is used in tactical situations to indicate that an imminent danger, typically from an adversary or hostile entity, has been identified. By alerting the gunner to this possible threat, they can prepare to engage or take defensive measures as necessary.

This not only enhances situational awareness but also allows for a coordinated response from the crew, ensuring they are ready to protect the vessel and its mission. The emphasis is on the gunner's need to be aware of threats in close proximity, which can drastically affect decision-making and operational readiness.

Other options do not accurately capture the primary function of the "Action" command. For instance, while knowledge of the weapons used, target speed and direction, or weapon readiness are important aspects of operational readiness, they are not the specific focus of the "Action" command itself. The command is primarily about signaling a threat to the crew, which is vital for response and engagement protocols.