Vague Flight Rules

In the real world, regulations do not set a specific distance that pilots flying under VFR must maintain. The following guideline is provided in §91.111 of the Electronic Code of Federal Regulations.

§91.111, Operating near other aircraft: (a) No person may operate an aircraft so close to another aircraft as to create a collision hazard. (b) No person may operate an aircraft in formation flight except by arrangement with the pilot in command of each aircraft in the formation.