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MNPS operations.
• each LRNS must be capable of providing to the flight crew a continuous indication of the aircraft
position relative to desired track.
• it is highly desirable that the navigation system employed for the provision of steering guidance is
capable of being coupled to the autopilot.
1.4 ROUTES FOR USE BY AIRCRAFT NOT EQUIPPED WITH TWO LRNSs
Routes for Aircraft with Only One LRNS
1.4.1 A number of special routes have been developed for aircraft equipped with only one LRNS*
and carrying normal short-range navigation equipment (VOR, DME, ADF), which require to cross the North
Atlantic between Europe and North America (or vv). It should be recognised that these routes are within
MNPS Airspace, and that State approval must be obtained prior to flying along them. These routes are also
available for interim use by aircraft normally approved for unrestricted MNPS operations that have suffered
a partial loss of navigation capability and have only a single remaining functional LRNS. Detailed
descriptions of the special routes known as ‘Blue Spruce Routes’ are included in Chapter 10, paragraph
10.2.2 of this Document. Other routes also exist within MNPS Airspace that may be flown by aircraft
equipped with only a single functioning LRNS. These include routings between the Azores and the
NORTH ATLANTIC MNPSA OPERATIONS MANUAL CHAPTER 1
NAT MNPS 4 Edition 2005
Portuguese mainland and/or the Madeira Archipelago and also routes between Northern Europe and
Spain/Canaries/Lisbon FIR to the east of longitude 009° 01' W (viz.T9).
Note: if this single LRNS is a GPS it must be approved in accordance with FAA TSO-C129 or later
standard as Class A1, A2, B1, B2, C1 or C2, or with equivalent JAA documentation JTSO-C129a.
Some States may have additional requirements regarding the carriage and use of GPS (e.g. a
requirement for FDE RAIM) and pilots should check with their own State of Registry to ascertain
what, if any, they are. (These above mentioned documents can be found at :
http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgWebcomponents.nsf/HomeFrame?
OpenFrameSet and
Routes for Aircraft with Short-Range Navigation Equipment Only
1.4.2 Aircraft that are equipped only with short-range navigation equipment (VOR, DME, ADF)
may operate through MNPS Airspace but only along routes G3 or G11. However, once again formal State
Approval must be obtained. (See Chapter 10 , paragraph 10.2.2 for details of these routes.)
1.4.3 The filed ATS Flight Plan does not convey information to the controller on any such MNPS
certification limitation. Hence, it is the responsibility of those pilots with less than unrestricted (i.e.
limited) certification to reject any ATC clearances that would otherwise divert them from officially
permitted routes.
1.5 SPECIAL ARRANGEMENTS FOR THE PENETRATION OF MNPS AIRSPACE BY NONMNPS
APPROVED AIRCRAFT
1.5.1 Aircraft not approved for operation in MNPS Airspace may be cleared by the responsible
ATC unit to climb or descend through MNPS Airspace provided:
• MNPS approved aircraft operating in that part of the MNPS Airspace affected by such climbs or
descents are not penalised.
Details of other required provisions will be found in the AIS publications of the appropriate ATS Provider
State.
1.6 SPECIAL ARRANGEMENTS FOR NON-RVSM APPROVED AIRCRAFT :
- To Climb/Descend Through RVSM Levels
1.6.1 MNPS approved aircraft that are not approved for RVSM operation will be permitted,
subject to traffic, to climb/descend through RVSM levels in order to attain cruising levels above or below
RVSM airspace. Flights should climb/descend continuously through the RVSM levels without stopping at
any intermediate level and should “Report leaving” current level and “Report reaching” cleared level (N.B.
this provision contrasts with the regulations applicable for RVSM airspace operations in Europe, where
aircraft not approved for RVSM operations are not permitted to effect such climbs or descents through
RVSM levels.). Such aircraft are also permitted to flight plan and operate at FL430 either Eastbound or
Westbound above NAT MNPS Airspace.
NORTH ATLANTIC MNPSA OPERATIONS MANUAL CHAPTER 1
NAT MNPS 5 Edition 2005
- To Operate at RVSM Levels
1.6.2 ATC may provide special approval for an MNPS approved aircraft that is not approved for
RVSM operation to fly in MNPS Airspace provided that the aircraft:
• is on a delivery flight; or
• was RVSM approved but has suffered an equipment failure and is being returned to its base
for repair and/or re-approval; or
• is on a mercy or humanitarian flight.
1.6.3 Operators requiring such special approval should request prior approval by contacting the
 
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