Which of the following is included in the handoff phrase for SWA35?

The correct answer describes the proper terminology used in aviation communications when referring to altitude and flight levels. The phrase "Flight level one niner zero" is consistent with established aviation nomenclature where "flight level" indicates altitude in hundreds of feet above sea level, with "one niner zero" corresponding to an altitude of 19,000 feet. This is the standard way pilots and air traffic controllers communicate altitude, ensuring clarity and precision.

In aviation, clear and standardized terminology is crucial for effective communication, which minimizes the risk of misunderstanding between pilots and air traffic control. The phrase "flight level" specifically conveys that altitude is measured in accordance with pressure settings, differentiating it from simple altitude references that may not consider atmospheric conditions.

The other choices do not adhere to this standardized format. "Flight level of one thousand" lacks the correct terminology by not phrasing it as "one thousand." "Altitude of 19,000 feet" uses the term altitude instead of flight level, which might lead to confusion. "Height of five zero miles" is an inaccurate and misleading way to convey altitude as it misuses the unit of measure for aviation altitude without context or correct phrasing. Hence, the adoption of the standard phrase “Flight level one niner zero