Final answer:
The question asks about aviation rules for the altitude at which aircraft fly northbound east of a certain point, and it pertains to air traffic control regulations and the physics of an airplane's trajectory affected by wind.
Step-by-step explanation:
The question relates to aviation rules regarding the altitude at which aircraft must fly in a given direction. Aircraft flying east of a specific meridian must maintain odd altitudes when travelling northbound, according to air traffic control regulations. This is part of a set of rules known as semicircular (or hemispheric) cruising altitude rules designed to reduce the risk of collisions between aircraft. When aircraft fly north or south, these regulations specify that those travelling east should be at odd thousands of feet altitudes (e.g., 35,000 feet), while those flying west should be at even thousands of feet altitudes (e.g., 36,000 feet).
Furthermore, the underlying physics principles related to the effect of wind on an airplane's trajectory have been referenced in the question. These principles deal with the components of the velocity of the airplane and how they are affected by the wind's speed and direction to result in a different ground speed and bearing. To determine the wind's impact on the airplane, vector addition would be used, which involves decomposing the airplane's velocity into different directional components and then adding the wind's velocity vector.