Which command indicates to Sailors to move from normal interval to close interval while in line?

The command that directs Sailors to move from normal interval to close interval while in line is "Close March." This command is specifically recognized in naval training and regulations as the order to adjust formation spacing. When given, it instructs the Sailors to reduce the distance between each other in a line formation, ensuring a more condensed and efficient assembly.

Using "Close March" emphasizes the need for immediate action to tighten the formation, which is essential for various drill movements and in scenarios where space may be limited or when increased cohesion is required. It establishes a clear and distinct command to create a tighter formation, ensuring that everyone understands the intended action with clarity and precision.

The other commands listed do not convey the specific instruction to shorten the interval in a line formation. "Move In" is more vague and can refer generally to adjustment without specifying the nature of the spacing. "Squad, Close" may suggest a similar action but is not the standard command used for closing the interval in this context. "Shorten Line" implies a change in formation but does not adequately indicate that Sailors should perform the action of moving to a close interval. Therefore, "Close March" is the correct and precise command for this situation.