Heavy (aeronautics)
WEIGHT CLASSIFICATION FOR AIRCRAFT OF 136,000 KG (300,000 LB) OR MORE
Heavy (aviation); Heavy (aeronautics)
The term heavy is used during radio transmissions between air traffic control and any aircraft which has been assigned a maximum takeoff weight (MTOW) rating of or more. Aircraft with a MTOW rating between 7 t and 136 t are considered medium, and aircraft with a MTOW rating less than 7 t are considered light.