So, youve decided the risk is worth it and youre going to execute a zero-zero or low-visibility takeoff. Youve thoroughly prepped the airplane, the cockpit and yourself for the operation, youve practiced it, you have a solid-gold takeoff alternate only a few miles away, with an ILS above minimums, and youre ready. One problem: The weather is so bad, you cant see more than one or two of the runway stripes at a time. Is that enough to help ensure directional control on the takeoff roll? Probably not.
During zero-zero or low-visibility takeoffs, pilots cannot rely on visual runway cues for directional control and must use cockpit instruments.
Vertical card compasses are unsuitable for maintaining directional control during takeoff due to significant errors like acceleration error.
Directional gyros and horizontal situation indicators are the recommended instruments for establishing and maintaining directional control in low visibility.
For effective use, gyro-driven instruments must be fully spun up, accurately aligned to the runway heading before takeoff, and closely monitored throughout the takeoff roll.
So, youve decided the risk is worth it and youre going to execute a zero-zero or low-visibility takeoff. Youve thoroughly prepped the airplane, the cockpit and yourself for the operation, youve practiced it, you have a solid-gold takeoff alternate only a few miles away, with an ILS above minimums, and youre ready.
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