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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 vice versa). 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
NORTH ATLANTIC MNPSA OPERATIONS MANUAL CHAPTER 1
NAT MNPS 4 Edition 2009
equipped with only a single functioning LRNS. These include routings between the Azores and the
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). Other routes available for single
LRNS use are also established in MNPS airspace, including a routing between Iceland and the east coast of
Greenland and two routings between Kook Islands on the west coast of Greenland and Canada.
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 EASA documentation ETSO-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?OpenFrame
Set and http://www.easa.europa.eu/ws_prod/g/doc/Agency_Mesures/Certification%20Spec/CS-ETSO.pdf
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.
1.5.2 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 2009
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:
a) is on a delivery flight; or
b) was RVSM approved but has suffered an equipment failure and is being returned to its base
for repair and/or re-approval; or
c) is on a mercy or humanitarian flight.
1.6.3 Operators requiring such special approval should request prior approval by contacting the
initial Oceanic Area Control Centre (OAC), normally not more than 12 hours and not less than 4 hours prior
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