What is the T6 standard for aircraft lighting during night operations while in motion?

The correct answer indicates that during night operations while in motion, all external lighting must be turned on. This is crucial for ensuring visibility and safety both for the aircraft itself and for other aircraft and ground personnel. Using all available external lights enhances the aircraft's visibility to others in the vicinity, which is especially important during the night when sightlines are limited. This practice significantly reduces the risk of collisions and facilitates safer navigation on the ground.

Turning on all external lights not only aids in the aircraft's own visibility but also allows pilots and crew members to have a better perception of their surroundings, including potential obstructions or other aircraft. While specific regulations may vary by jurisdiction, the overarching principle of increased visibility during night operations is a standard safety protocol widely recognized in aviation operations.