X hits on this document

393 views

0 shares

0 downloads

0 comments

83 / 145

Guidance concerning Air Navigation in and above the NAT MNPSA

CHAPTER 10

10.3.5

The technical height-keeping accuracy of aircraft flying at RVSM levels is passively

monitored during flight over a Height Monitoring Unit (HMU) located near to Strumble in Wales. Alternatively, individual aircraft can be monitored through temporary carriage of portable GPS (Height) Monitoring Units (GMUs). Furthermore, height monitoring data is available to the NAT CMA from the 3 European HMUs. This monitoring allows the height-keeping accuracies of aircraft types and individual operator’s fleets to be assessed. Individual airframes which do not meet required performance standards can also be identified. On such occasions the operator and the State of Registry are advised of the problem and

corrective action must be undertaken before further flights in RVSM airspace are conducted.

10.3.6

The overall vertical navigation performance of all aircraft in NAT RVSM airspace is

continually assessed and compared to the standards established for the Region, to assess whether the relevant

TLS is being maintained.

Monitoring of Operational Height-keeping Performance

10.3.7

The introduction of RVSM Airspace into the NAT Region has increased the necessity for

consistent and accurate reporting by pilots and ATC units, of all deviations of 90 m (300 ft) or more from the

cleared flight level, whatever the cause.

Monitoring of Technical Height-keeping Performance

10.3.8

The NAT RVSM programme, from the outset, required confirmation that the RVSM

MASPS were being met programme was therefore

and would continue to be met in future years.

A technical height-keeping

initiated,

originally

employing

two

height

monitoring

units

(HMU)

at

Strumble

(United Kingdom) and Gander (Canada), along with a number of portable GPS monitoring The Gander unit was subsequently decommissioned. The programme met its initial objectives to produce data as part of an integrated monitoring programme intended to establish RVSM

units (GMU). and continues Airspace on a

global basis.

Revised Minimum Monitoring Requirements for RVSM Approval, as specified in ICAO

Annex 6, will become effective in November 2010.

    • 10.4

      Monitoring of ACAS II Performance

      • 10.4.1

        ACAS II can have a significant effect on ATC. Therefore, there is a continuing need to

monitor the performance of ACAS II in the developing ATM environment.

10.4.2

Following an RA event, or other significant ACAS II event, pilots and controllers should

complete an ACAS II RA report. Aircraft Operators and ATS authorities should forward completed reports

through established channels.

    • 10.5

      Overall Navigation (and Systems) Performance

      • 10.5.1

        All information relating to horizontal and vertical navigation (and systems) performance

within the NAT Region is provided to the NAT SPG via the CMA. Regular statistical assessments of system safety determine whether or not the overall target level of safety (TLS) is being met. On those occasions that summary statistics show that the TLS, in either the horizontal or vertical planes, has been exceeded, the NAT SPG is informed; in which case the NAT SPG will take appropriate action.

10.5.2

The introduction of modern technology into aircraft systems has lead to a gradual reduction

in the statistical risk of collision in the NAT, in spite of the continual increase in traffic.

NAT Doc 007

67

Edition 2010

Document info
Document views393
Page views393
Page last viewedThu Dec 08 10:40:13 UTC 2016
Pages145
Paragraphs4885
Words62134

Comments