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conducted in accordance with the instrument flight rules shall
not be commenced unless the available information indicates
that conditions, at the heliport of intended landing and at least
one alternate heliport will, at the estimated time of arrival, be
at or above the heliport operating minima.
Note.— It is the practice in some States to declare, for
flight planning purposes, higher minima for a heliport when
nominated as an alternate than for the same heliport when
planned as that of intended landing.
2.6.2.2 When no alternate is required. A flight to be
conducted in accordance with the instrument flight rules to a
heliport when no alternate heliport is required shall not be
commenced unless available current meteorological information
indicates that the following meteorological conditions
will exist from two hours before to two hours after the
estimated time of arrival: or from the actual time of departure
to two hours after the estimated time of arrival, whichever is
the shorter period:
a) a cloud base of at least 120 m (400 ft) above the
minimum associated with the instrument approach
procedure; and
b) visibility of at least 1.5 km more than the minimum
associated with the procedure.
Note.— These should be considered as minimum values
where a reliable and continuous meteorological watch is
maintained. When only an “area” type forecast is available
these values should be increased accordingly.
2.6.3 Heliport operating minima
2.6.3.1 A flight shall not be continued towards the
heliport of intended landing unless the latest available
meteorological information indicates that conditions at that
heliport, or at least one alternate heliport, will, at the estimated
time of arrival, be at or above the specified heliport operating
minima.
2.6.3.2 An instrument approach shall not be continued
beyond the outer marker fix in case of precision approach, or
below 300 m (1 000 ft) above the heliport in case of nonprecision
approach, unless the reported visibility or controlling
RVR is above the specified minimum.
2.6.3.3 If, after passing the outer marker fix in case of
precision approach, or after descending below 300 m (1 000 ft)
above the heliport in case of non-precision approach, the
reported visibility or controlling RVR falls below the specified
minimum, the approach may be continued to DA/H or
MDA/H. In any case, a helicopter shall not continue its
approach-to-land beyond a point at which the limits of the
heliport operating minima would be infringed.
2.6.4 Flight in icing conditions
A flight to be operated in known or expected icing conditions
shall not be commenced unless the helicopter is certificated
and equipped to cope with such conditions.
2.7 Alternate heliports
2.7.1 For a flight to be conducted in accordance with the
instrument flight rules, at least one suitable alternate shall be
specified in the operational flight plan and the flight plan,
unless:
a) the weather conditions in 2.6.2.2 prevail, or
b) 1) the heliport of intended landing is isolated and no
suitable alternate is available; and
2) an instrument approach procedure is prescribed for the
isolated heliport of intended landing; and
3) a point of no return (PNR) is determined in case of an
off-shore destination.
2.7.2 Suitable off-shore alternates may be specified
subject to the following:
a) the off-shore alternates shall be used only after passing
a point of no return (PNR). Prior to PNR on-shore
alternates shall be used;
b) mechanical reliability of critical control systems and
critical components shall be considered and taken into
account when determining the suitability of the
alternate;
23/11/06
No. 11
Section III, Chapter 2 Annex 6 — Operation of Aircraft
III-2-3 1/11/01
c) one engine inoperative performance capability shall be
attainable prior to arrival at the alternate;
d) deck availability shall be guaranteed; and
e) weather information must be reliable and accurate.
Note.— The landing technique specified in the flight
manual following control system failure may preclude the
nomination of certain helidecks as alternate heliports.
2.7.3 Recommendation.— Off-shore alternates should
not be used when it is possible to carry enough fuel to have an
on-shore alternate. Such circumstances should be exceptions
and should not include payload enhancement in adverse
weather conditions.
2.8 Fuel and oil supply
2.8.1 All helicopters. A flight shall not be commenced
unless, taking into account both the meteorological conditions
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