What does "IL" mean when noted in METAR remarks?

In METAR remarks, "IL" stands for "Ice present on the airfield." This notation is used in aviation weather reports to indicate that ice has been detected on the runway or taxiway surfaces, which can significantly impact safety during takeoff, landing, and ground operations.

The presence of ice on the airfield can lead to slippery conditions, making it critical for pilots and air traffic controllers to be aware of it for proper decision-making regarding aircraft operations. This information helps in assessing the need for de-icing procedures or adjusting flight operations to ensure safety.

The other options, while related to ice conditions, do not accurately capture what "IL" signifies in METAR remarks. The specific wording used in this aviation context is important for clear communication and operational safety.