It is prescribed and approved for a specific airport by competent authority. In some instances, the signals received from the ground can be fed into the automatic pilot for automatically controlled approaches. Life cycle benefits means the value of services provided to aviation users over the life span of a facility or service. Life cycle costs means the value of research and development costs, investment costs, operation costs, maintenance costs, and termination costs over the life span of a facility or service. Maintenance costs means the costs incurred in servicing and maintaining a facility after establishment.
Noncommercial traffic means all aircraft operations that are conducted free of compensation.
Nonprecision approach procedure means an FAA standard for approaching an IFR runway where no electronic glide slope is available. Nonscheduled commercial service means the carriage by aircraft in air commerce of persons or property for compensation or hire that are not operated in regularly scheduled service such as charter flights. PVB or BPV means the discounted value of life cycle benefits. PVC or CPV means the discounted value of life cycle benefits. PVCM or CMPV means the discounted value of operations and maintenance costs less termination costs over a facility's remaining life cycle.