Which of the following is a key part of the takeoff data in a Dash 1?

The takeoff data in a Dash 1 encompasses various critical elements that ensure a safe and efficient takeoff procedure. This includes noise abatement procedures, which are critical for minimizing the impact of aircraft noise on surrounding communities. Such procedures guide pilots on how to handle their aircraft during takeoff to reduce noise levels, which is particularly important in areas near busy airports.

Departure routes are another vital component of takeoff data, as they provide predefined paths for aircraft to follow once airborne. These routes are designed to contribute to air traffic management and safety by helping to minimize conflicts with other air traffic and optimizing the flow of departures.

Runway length is also a fundamental aspect of takeoff data. It specifies the required distance for the aircraft to achieve lift based on various factors like weight, wind conditions, and aircraft performance characteristics. Adequate runway length ensures that the aircraft can safely accelerate and reach a speed sufficient for takeoff.

Since each of these elements—noise abatement procedures, departure routes, and runway length—plays an integral role in the safe operation of the aircraft during takeoff, the answer truly is that all of the listed components are key parts of the takeoff data in the Dash 1.