Aeronautical Terms beginning with T

Telephone Information Briefing Service (TIBS)

A telephone recording of meteorological and/or aeronautical information obtained by calling an FSS. Discontinued in the CONUS in September 2018 and in Alaska on Jan 1, 2020.

Trace Icing

Ice becomes noticeable. The rate of accumulation is slightly greater than the rate of sublimation. A representative accretion rate for reference purposes is less than 1⁄4 inch (6 mm) per hour on the outer wing. Deicing/anti-icing equipment is not utilized unless encountered for an extended period of time (over 1 hour).