Page 106 - UK ATM ANS Regulations (Consolidated) 201121

Part MET - ANNEX V - Specific Requirements for the Providers of Meteorological
Services

GENERAL REGULATION INFORMATION
Part MET
ANNEX V - Specific Requirements for the Providers of Meteorological Services

Commission Implementing Regulation (EU) 2017/373 of 1 March 2017 laying down common
requirements for providers of air traffic management/air navigation services and other air traffic
management network functions and their oversight, repealing Regulation (EC) No 482/2008,
Implementing Regulations (EU) No 1034/2011, (EU) No 1035/2011 and (EU) 2016/1377 and
amending Regulation (EU) No 677/2011 (Retained EU Legislation)

REGULATION ITEMS BY SECTION

SUBPART A ADDITIONAL ORGANISATION REQUIREMENTS FOR PROVIDERS OF METEOROLOGICAL SERVICES (MET.OR)
Reference Description
MET.OR.100 Meteorological data and information
(a) A meteorological services provider shall provide operators, flight crew members, air traffic
services units, search and rescue services units, aerodrome operators, accident and
incident investigation bodies, and other service providers and aviation entities with the
meteorological information necessary for the performance of their respective functions,
as determined by the competent authority.
(b) A meteorological services provider shall confirm the operationally desirable accuracy of
the information distributed for operations, including the source of such information, whilst
also ensuring that such information is distributed in a timely manner and updated, as
required.
MET.OR.100 GM1 Meteorological data and information
DATA AND INFORMATION RELIABILITY
Owing to the variability of meteorological elements in space and time, to limitations of observing
techniques, and to limitations caused by the definitions of some of the elements, the specific value of
any of the elements given in a meteorological report or in a forecast is understood to be the best
approximation to the actual conditions at the time of observation or the most probable value that the
element is likely to assume during the period of the forecast, respectively. Similarly, when the time of
occurrence or change of an element is given in a forecast, this time is understood to be the most
probable time.
MET.OR.100(a) AMC1 Meteorological data and information
INFORMATION TO BE PROVIDED
An agreement between the meteorological services provider and the appropriate ATS unit should be
established to cover:
(a) the provision in air traffic services units of displays related to semi-automatic observing
systems or automatic observing systems;
(b) the calibration and maintenance of these displays/instruments;
(c) the use to be made of these displays/instruments by air traffic services personnel;
(d) as and where necessary, supplementary visual observations, such as meteorological
phenomena of operational significance in the climb-out and approach areas, if and when
made by air traffic services personnel to update or supplement the information supplied
by the meteorological station;
(e) meteorological information obtained from aircraft taking off or landing such as on wind
shear; and
(f) if available, meteorological information obtained from ground weather radar.
MET.OR.100(a) GM1 Meteorological data and information
OTHER AVIATION ENTITIES
The competent authority determines who may be the 'other service providers and aviation entities'
that could be provided with the necessary meteorological information.
MET.OR.105 Retention of meteorological information
(a) A meteorological services provider shall retain meteorological information issued for a
period of at least 30 days from the date of issue.
(b) This meteorological information shall be made available, on request, for inquiries or
investigations and, for these purposes, shall be retained until the inquiry or investigation is
completed.
MET.OR.105(b) GM1 Retention of meteorological information
GENERAL
The competent authority determines who may be provided with meteorological information about
inquiries and investigations concerning aviation.
MET.OR.110 Meteorological information exchange requirements
A meteorological services provider shall ensure it has systems and processes in place, as well as
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