What is the common abbreviation for the product that provides terminal aerodrome forecasts?

The correct abbreviation for the product that provides terminal aerodrome forecasts is TAF. Terminal Aerodrome Forecasts are specifically designed to provide weather predictions for airports, typically covering a period of up to 24 or 30 hours and indicating important weather elements such as wind, visibility, precipitation, and significant weather phenomena at or near the airport. This information is vital for pilots in planning their flights, as it helps them understand the expected weather conditions at their destination or during their approach.

In contrast, METAR refers to routine aviation weather reports that provide current weather conditions at airports rather than forecasts. TAC and TAS are related to tactical air control and true airspeed respectively and do not pertain to weather forecasting. Thus, TAF is the most pertinent and recognized abbreviation in the context of terminal weather forecasting.