Precedes other terms and generally means without the use of radar, such as:
  1. Nonradar Approach. Used to describe instrument approaches for which course guidance on final approach is not provided by ground-based precision or surveillance radar. Radar vectors to the final approach course may or may not be provided by ATC. Examples of nonradar approaches are VOR, NDB, TACAN, ILS, RNAV, and GLS approaches. (See Final Approach Course.) (See FINAL APPROACH-IFR.) (See Instrument Approach Procedure.) (See RADAR APPROACH.)
  2. Nonradar Approach Control. An ATC facility providing approach control service without the use of radar. (See Approach Control Facility.) (See Approach Control Service.)
  3. Nonradar Arrival. An aircraft arriving at an airport without radar service or at an airport served by a radar facility and radar contact has not been established or has been terminated due to a lack of radar service to the airport. (See RADAR ARRIVAL.) (See RADAR SERVICE.)
  4. Nonradar Route. A flight path or route over which the pilot is performing his/her own navigation. The pilot may be receiving radar separation, radar monitoring, or other ATC services while on a nonradar route. (See RADAR ROUTE.)
  5. Nonradar Separation. The spacing of aircraft in accordance with established minima without the use of radar; e.g., vertical, lateral, or longitudinal separation. (See Radar Separation.)

Source: PCG