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MNPS Airspace requirements are still applicable from FL285 to FL420. BOTA has the same vertical extent
as the Shanwick OCA, and is bounded by lines joining successively the following points:
N4834 W00845 – N4830 W00800 – N4500 W00800 – N4500 W00845 – N4834 W00845
3.3.14 Air Traffic service is provided by the Brest ACC, call sign BREST CONTROL.
NORTH ATLANTIC MNPSA OPERATIONS MANUAL CHAPTER 3
NAT MNPS 16 Edition 2005
Figure 3 - Other Routes and Structures Within and Above NAT MNPS Airspace
Please note that this Chart will be updated to take into account the implementation of NOTA and the
cancellation of the SST routes
NORTH ATLANTIC MNPSA OPERATIONS MANUAL CHAPTER 4
NAT MNPS 17 Edition 2005
Chapter 4: Flight Planning
4.1 FLIGHT PLAN REQUIREMENTS
General
4.1.1 It is essential that care is taken when feeding track information into a computer and the
information should be cross-checked before it is given to the operating crew. Crews of all NAT MNPSA
flights, even those that are not planned to use the OTS, should be given both the organised track message and
relevant amendments to it. (N.B. In the event of a contingency or diversion, knowledge of the location of the
OTS tracks will be useful to the crew of any NAT MNPSA flight). Should more than one version of the daily
Track Message have been issued, then crews should be issued the entire revised version together with an
appropriate explanation to relate differences between versions. Each successive version will be identified by
the TMI and an alphabetic suffix. e.g. 243A, 243B etc.
4.1.2 All flights which generally route in an eastbound or westbound direction should normally be
flight planned so that specified ten degrees of longitude (20°W, 30°W, 40°W etc.) are crossed at whole
degrees of latitude; and all generally northbound or southbound flights should normally be flight planned so
that specified parallels of latitude spaced at five degree intervals (65°N, 60°N, 55°N etc.) are crossed at
whole degrees of longitude. (N.B. For those flights that generally route in an eastbound or westbound
direction, it is important that the latitude crossings of ALL oceanic ten-degree meridians be included as
waypoints in the flight plan submitted to ATC. Even where “named” significant points are close to these
"prime" meridians of longitude it is not appropriate to omit the ten-degree crossings from the ATC Flight
Plan.).
4.1.3 All flights should plan to operate on great circle tracks joining successive significant
waypoints.
Routings
4.1.4 During the hours of validity of the OTS, operators are encouraged to flight plan as follows:
• in accordance with the OTS; or
• along a route to join or leave an outer track of the OTS; or
• on a random route to remain clear of the OTS
4.1.5 Nothing in the paragraph above prevents operators from flight planning across the OTS.
However they should be aware that whilst ATC will make every effort to clear random traffic across the
OTS at published levels, re-routes or significant changes in flight level are likely to be necessary during most
of the OTS traffic periods.
4.1.6 Outside of the OTS periods operators may flight plan any random routing, except that during
the two hours prior to each OTS period the following restrictions apply:
(1) eastbound flights that cross 30°W less than one hour prior to the incoming/pending westbound
OTS (i.e. after 1029 UTC), or westbound flights that cross 30°W less than one hour prior to the
incoming/pending eastbound OTS (i.e. after 2359 UTC), should plan to remain clear of the
incoming/pending OTS structure.
NORTH ATLANTIC MNPSA OPERATIONS MANUAL CHAPTER 4
NAT MNPS 18 Edition 2005
(2) any such opposite direction flights crossing 30oW between one and two hours prior to the
incoming/pending OTS (i.e. any eastbound flights between 0930 and 1029 UTC, or any
westbound flights between 2300 and 2359 UTC) where the route beyond 30°W would coincide
with the incoming/pending OTS structure at any point, should plan to join an outer track at any
point, or backtrack the length of one of the incoming/pending tracks.
Flight Levels
4.1.7 Within RVSM Airspace greater opportunity exists for step climbs. Operators may include
step climbs in the flight plan, although each change of level during flight must be requested from ATC by the
pilot. The chance of approval of such requests will, of course, be entirely dependent upon potential traffic
conflicts. Outside the OTS there is a good likelihood of achieving the requested profiles. However, within
the prime OTS levels at peak times, ATC may not always be able to accommodate requested flight level
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