What should a Marine do with their hands during weight measurement?

During weight measurement, it is essential for accuracy that the individual stands still and maintains a stable posture. Keeping the hands by the side minimizes any potential interference with the scale's measurement. This positioning helps avoid any shifting or movement that might skew the reading. It also allows for an even distribution of weight, which is critical for getting an accurate measurement.

In contrast, holding onto the scale can add extra weight, and placing hands on the hips or away from the body could lead to uneven weight distribution, potentially altering the reading. Therefore, having the hands by the side is the optimal choice for precise weight measurement.