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Helicopter ground tariway. A ground taiiway for use by
helicopters only.
Helicopter stand An aircraft stand which provides for parking
a helicopter and, where air taxiing operations are contemplated,
the helicopter touchdown and lift-off.
Helideck. A heliport located on a floating or fixed off-shore
structure.
Heliport. An aerodrome or a defined area on a structure
intended to be used wholly or in part for the arrival,
departure and surface movement of helicopters.
Integrity (aeronautical data). A degree of assurance that an
aeronautical data and its value has not been lost nor altered
since the data origination or authorized amendment.
Obstacle. All fixed (whether temporary or permanent) and
mobile objects, or parts thereof, that are located on an area
intended for the surface movement of aircraft or that extend
above a defined surface intended to protect aircraft in
flight.
Orthometric height. Height of a point related to the geoid,
generally presented as an MSL elevation.
Safety area. A defined area on a heliport surrounding the
FAT0 which is free of obstacles, other than those required
for air navigation purposes, and intended to reduce the risk
of damage to helicopters accidentally diverging from the
FATO.
Station declination. An alignment variation between the zero
degree radial of a VOR and true north, determined at the
time the VOR station is calibrated.
Surface level heliport. A heliport located on the ground or on
the water.
Touchdown and lift-off area (TLOF). A load bearing area on
which a helicopter may touch down or lift off.
1.2 Applicability
1.2.1 The interpretation of some of the specifications in
the Annex expressly requires the exercising of discretion, the
taking of a decision or the performance of a function by the
appropriate authority. In other specifications, the expression
appropriate authority does not actually appear although its
inclusion is implied. In both cases, the responsibility for whatever
determination or action is necessary shall rest with the
State having jurisdiction over the heliport.
1.2.2 The specifications in Annex 14, Volume 11, shall
apply to all heliports intended to be used by helicopters in
international civil aviation. The specifications of Annex 14,
Volume I, shall apply, where appropriate, to these heliports as
well.
1.2.3 Wherever a colour L referred to in this volllme,
the specifications for that colour given in Appendix 1 to
Annex 14, Volume I, shall apply.
13 Common reference systems
1.3.1 Horizontal reference system
1.3.1.1 World Geodetic System - 1984 (WGS-84) shall
be used as the horizontal (geodetic) reference system.
Reported aeronautical geographical coordinates (indicating
latitude and longitude) shall be expressed in terms of the
WGS-84 geodetic reference datum.
Note.- Comprehensive guidance material concerning
WGS-84 is contained in the World Geodetic System - 1984
(WGS-84) Manual (Doc 9674).
2511 1104
No. 3
Chapter 1 Annex 14 -Aerodromes
1.3.2 Vertical reference system 1.3.3 Temporal reference system
1.3.2.1 Mean sea level (MSL) datum, which gives the 1.3.3.1 The Gregorian calendar and Coordinated Univerrelationship
of gravity-related height (elevation) to a surface sal Time (UTC) shall be used as the temporal reference
known as the geoid, shall be used as the vertical reference system.
system.
1.3.3.2 When a different temporal reference system is
Note 1.- The geoid globally most closely approximates used, this shall be indicated in GEN 2.1.2 of the Aeronautical
MSL. It is defined as the equipotential surface in the gravity Information Publication (AIP).
field of the Earth which coincides with the undisturbed MSL
extended continuously through the continents.
Note 2.- Gravity-related heights (elevations) are also r standard
rgerred to as orthometric heights while distances of points 19104, Geographic information - Terminology
above the ellipsoid are referred to as ellipsoidal heights. 19 108, Geographic information - Temporal schema
CHAPTER 2. HELIPORT DATA
2.1 Aeronautical data
2.1.1 Determination and reporting. of heliport related
aeronautical data shall be in accordance with the accuracy and
integrity requirements set forth in Tables 1 to 5 contained in
Appendix 1 while taking into account the established quality
system procedures. Accuracy requirements for aeronautical
data are based upon a 95 per cent confidence level and in that
respect, three types of positional data shall be identified:
surveyed- points (e.g. FAT0 threshold); calculated points
(mathematical calculations from the known surveyed points of
　
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