What is the most common visual reference used for taxiing staggered?

The most common visual reference used for taxiing staggered involves aligning the exhaust stack on the taxi line. This technique is especially important in a staggered formation to ensure that the aircraft maintain a safe distance from each other while taxiing, as they are not aligned directly in a single line. By using the exhaust stack as a reference point, pilots can better gauge their position relative to the taxiway and the other aircraft, helping to maintain proper spacing and line of travel without compromising safety. This practice helps prevent collisions and ensures efficient movement on the ground.

The other references, although used in various contexts, do not provide the same level of precision for staggered taxiing as aligning the exhaust stack does. For example, aligning the aircraft nose with the centerline or positioning the wingtip parallel to the taxiway might be more relevant for straight taxiing rather than staggered formations. Using the landing gear for guidance can be useful, but it may not offer as clear a visual reference as the exhaust stack when dealing with staggered positions.