In aviation weather reporting, what term would indicate that precipitation is negligible or very light?

The term that indicates precipitation is negligible or very light is represented by a minus sign (-). In aviation weather reporting, the use of a minus sign before the precipitation type signifies light intensity. This system allows pilots and meteorologists to quickly assess the weather conditions, especially when determining the operational limits of flight.

For instance, when looking at weather reports, if you see "RA-" this indicates light rain specifically. The convention of using symbols like the minus sign offers a standardized way of communicating weather severity, facilitating effective decision-making in flight operations.

The other options represent different types of weather phenomena or intensity levels. A plus sign (+) denotes heavy precipitation, while SN would refer to snow, and SQ would indicate showers. Understanding these codes is essential for interpreting weather reports accurately in aviation.