Page 394 - UK Air Operations Regulations 201121

Part CAT - ANNEX IV - Commercial Air Transport Operations

required flight crew member station.
CAT.IDE.A.340 Radio equipment for operations under VFR over routes navigated by reference to visual landmarks
Aeroplanes operated under VFR over routes navigated by reference to visual landmarks shall be
equipped with radio communication equipment necessary under normal radio propagation conditions
to fulfil the following:
(a) communicate with appropriate ground stations;
(b) communicate with appropriate ATC stations from any point in controlled airspace within
which flights are intended; and
(c) receive meteorological information.
CAT.IDE.A.345 Communication, navigation and surveillance equipment for operations under IFR or under VFR over routes not
navigated by reference to visual landmarks
(a) Aeroplanes operated under IFR or under VFR over routes that cannot be navigated by
reference to visual landmarks shall be equipped with radio communication, navigation and
surveillance equipment in accordance with the applicable airspace requirements.
(b) Radio communication equipment shall include at least two independent radio
communication systems necessary under normal operating conditions to communicate
with an appropriate ground station from any point on the route, including diversions.
with an appropriate ground station from any point on the route, including diversions.
(c) Notwithstanding point (b), aeroplanes operated for short haul operations in the North
Atlantic high-level (NAT HLA) airspace and not crossing the North Atlantic shall be equipped
with at least one long range communication system, in case alternative communication
procedures are published for the airspace concerned.
(d) Aeroplanes shall have sufficient navigation equipment to ensure that, in the event of the
failure of one item of equipment at any stage of the flight, the remaining equipment shall
allow safe navigation in accordance with the flight plan.
(e) Aeroplanes operated on flights in which it is intended to land in IMC shall be equipped with
suitable equipment capable of providing guidance to a point from which a visual landing
can be performed for each aerodrome at which it is intended to land in IMC and for any
designated alternate aerodrome.
(f) For PBN operations the aircraft shall meet the airworthiness certification requirements for
the appropriate navigation specification.
CAT.IDE.A.345 AMC1 Communication and navigation equipment for operations under IFR or under VFR over routes not navigated by
reference to visual landmarks
TWO INDEPENDENT MEANS OF COMMUNICATION
Whenever two independent means of communication are required, each system should have an
independent antenna installation, except where rigidly supported non-wire antennae or other antenna
installations of equivalent reliability are used.
CAT.IDE.A.345 AMC2 Communication and navigation equipment for operations under IFR or under VFR over routes not navigated by
reference to visual landmarks
ACCEPTABLE NUMBER AND TYPE OF COMMUNICATION AND NAVIGATION EQUIPMENT
(a) An acceptable number and type of communication and navigation equipment is:
(1) one VHF omnidirectional radio range (VOR) receiving system, one automatic
direction finder (ADF) system, one distance measuring equipment (DME), except
that an ADF system need not be installed provided that the use of ADF is not
required in any phase of the planned flight;
(2) one instrument landing system (ILS) or microwave landing system (MLS) where ILS
or MLS is required for approach navigation purposes;
(3) one marker beacon receiving system where a marker beacon is required for
approach navigation purposes;
(4) area navigation equipment when area navigation is required for the route being flown
(e.g. equipment required by Part-SPA);
(5) an additional DME system on any route, or part thereof, where navigation is based
only on DME signals;
(6) an additional VOR receiving system on any route, or part thereof, where navigation is
based only on VOR signals; and
(7) an additional ADF system on any route, or part thereof, where navigation is based
only on non-directional beacon (NDB) signals.
(b) Aeroplanes may be operated without the navigation equipment specified in (6) and (7)
provided they are equipped with alternative equipment. The reliability and the accuracy of
alternative equipment should allow safe navigation for the intended route.
(c) The operator conducting extended range operations with two-engined aeroplanes
(ETOPS) should ensure that the aeroplanes have a communication means capable of
communicating with an appropriate ground station at normal and planned contingency
altitudes. For ETOPS routes where voice communication facilities are available, voice
communications should be provided. For all ETOPS operations beyond 180 minutes,
reliable communication technology, either voice-based or data link, should be installed.
Where voice communication facilities are not available and where voice communication is
not possible or is of poor quality, communications using alternative systems should be
ensured.
(d) To perform IFR operations without an ADF system installed, the operator should consider
the following guidelines on equipment carriage, operational procedures and training criteria.
(1) ADF equipment may only be removed from or not installed in an aeroplane intended
to be used for IFR operations when it is not essential for navigation, and provided
that alternative equipment giving equivalent or enhanced navigation capability is
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