1.13 Other Routes and Route Structures Within or Adjacent to NAT MNPS General 1.13.1 When NAT MNPS Airspace was introduced, it was recognised that some special procedures and routes were needed. Procedures were required for aircraft suffering partial loss of their full navigational capability (see further on this in Part 3) whilst account had to betaken of those aircraft operating along a number of relatively short-range routes within MNPS Airspace. Further experience showed that account also had to betaken of aircraft not equipped with HF radio. Flights operating along these special routes (shown below) still however need State approval to operate within MNPS Airspace and must meet MNPS requirements. Routes for Aircraft With only One Long Range Navigation System (LRNS) 1.13.2 Aircraft operating in MNPS Airspace require two functional LRNS (see Part 4). However a number of special routes have been developed for aircraft equipped with only one LRNS. It is emphasised
