What is the primary reason for identifying an aircraft as 'heavy'?

Identifying an aircraft as 'heavy' primarily serves to alert others of potential wake turbulence issues. This terminology is crucial in air traffic control because larger aircraft generate more significant wake turbulence, which can pose a hazard to smaller aircraft following them. The 'heavy' designation helps controllers and pilots maintain safe distances between aircraft during takeoff, landing, and in-flight operations. By using this identification, all involved can anticipate the effects of the wake turbulence and take necessary precautions, such as extending the spacing behind a heavy aircraft to allow for a safer flight path.

The other options, while they may relate to aviation procedures, do not specifically address the primary safety concern associated with the classification of an aircraft as 'heavy.' For example, while high speed and emergency procedures are important considerations, they do not pertain directly to wake turbulence hazard management.