Calm wind is coded in the report as which of the following?

In weather observations, calm wind indicates a lack of significant wind and is communicated through specific coding. The code representing calm wind is 00000KT.

This coding consists of five digits, where the first three digits specify the wind direction in degrees, and the last two letters "KT" indicate knots. In this case, “000” means a wind direction of 0 degrees, and “00” signifies a wind speed of 0 knots. Thus, it effectively conveys that there is no wind.

This coding is crucial for pilots and meteorologists as it provides clear and precise information about atmospheric conditions. The use of the number “00000” explicitly defines the absence of wind, which is an important detail in weather reporting, particularly for flight operations.