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Visibility Procedures (LVPs) are
in force.
· when reported RVR is below
150m (200m Cat D aeroplanes)
additional runway features, crew
training, lateral guidance in the
aeroplane for the lower RVRs
and approval are required.
Low Visibility Procedures (LVPs)
Ground procedures at the
aerodrome designed to prevent the
entry of ground vehicles and taxying
aircraft into take-off and landing
areas. In addition, they protect the
sensitive areas of the aerodromes
ILS or MLS transmissions and
regulate the flow of air traffic on the
approach. ATC at the aerodrome
will ensure these procedures have
been implemented by the time the
cloud ceiling is below 200 ft or the
RVR has dropped to below 600m.
Maximum Zero Fuel Mass
The maximum permissible mass of
an aeroplane with no usable fuel.
The fuel contained in particular
tanks must be included in the zero
fuel mass when it is explicitly
mentioned in Flight Manual
limitations.
Maximum Structural Landing Mass
The maximum permissible total
aeroplane mass upon landing under
normal circumstances.
Maximum Structural Take-Off Mass
The maximum permissible total
aeroplane mass at the start of the
take-off run.
Minimum Descent Altitude/Height
(MDA/H)
A specified altitude/height in a nonprecision
or circling approach below
which descent may not be made
without visual reference.
Minimum Weather Conditions
In relation to an aerodrome, the
Cloud Ceiling and RVR for takeoff,
and Decision Height and RVR for
landing, below which you cannot
safely takeoff and land.
Missed Approach Point (MAP)
That point in an instrument
approach procedure at or before
which the prescribed missed
approach procedure must be
initiated in order to ensure that the
minimum obstacle clearance is not
infringed.
Non-precision Approach and
Landing Operations
An instrument approach and landing
which does not utilise electronic
glide path guidance. That is, there is
no vertical guidance, and all altitudes
associated with the procedure are
minimum IFR ones, or not to be
descended below. 1000 feet
clearance is provided above the
highest obstacle in the initial
Glossary 329
segment, 500 in the intermediate
segment and down to 250 feet in the
final segment (from final approach
fix to Missed Approach Point).
Notified
"As set forth in a document entitled
'Aeronautical Information
Publication' or 'Notam' published by
the Civil Aviation Authority (for the
UK) or by a country other than the
UK (when abroad) for the time
being in force"
Obstacle Clearance Altitude/Height
(OCA/H)
The lowest altitude (OCA), or the
lowest height above the elevation of
the relevant runway threshold or
above the aerodrome elevation as
applicable (OCH), used in
compliance with appropriate
obstacle clearance criteria.
Obstacle Clearance Limit (OCL)
The height above aerodrome
elevation below which the minimum
vertical clearance cannot be
maintained either on approach or in
the event of a missed approach.
Precision Approach and Landing
Operations
An instrument approach and landing
using precision azimuth and
glidepath guidance with minima
determined by the category.
Positioning
The practice of transferring crews
from place to place as passengers in
surface or air transport at the behest
of the operator.
Rule Distance
The distance in still air in the Rule
Time, at one-engine-inoperative
cruise speed.
Rule Time
The maximum diversion time any
point on the route may be, from a
suitable aerodrome, as per the
maximum authorised diversion time.
e.g. 120, 180 minutes.
Runway Visual Range (RVR)
The range over which the pilot of an
aeroplane on the centreline of a
runway can see its surface markings
or the lights delineating it.
Reported RVR
The RVR communicated to the
commander of an aeroplane, by or
on behalf of the person in charge of
the aerodrome.
Sector
The time between an aircraft first
moving under its own power until it
next comes to rest after landing.
Short Range flights
For helicopters, where the overwater
sector is between 10-30 nm.
Specified
In relation to aircraft means
specified by the Operator in, or
ascertainable by reference to, the
Operations Manual.
State Minima
In some countries (e.g. France), the
　
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