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LOW VISIBILITY PROCEDURES
1. INTRODUCTION:
Low Visibility Procedures (LVP) at Vijayawada Airport (VOBZ) are established to ensure the safe and efficient operation of aircraft during conditions of reduced visibility, in accordance with DGCA Civil Aviation Requirements, ICAO Annex 14, and the approved local Standard Operating Procedures.
Low Visibility Procedures at Vijayawada Airport (VOBZ) are applicable only to Category I (CAT I) operations and are established to facilitate take-off operations below the standard Category I take-off reference of 550 m RVR, as permitted under DGCA CAR Section 8, Series C, Part I. Due to the non-availability of runway centre line lights, take-off operations at this aerodrome are restricted to a minimum RVR of 400 m.
2. DEFINITIONS:
2.1 ILS Critical Area: An area of defined dimensions about the localizer and glide path antennas where aircraft and vehicles are excluded during all ILS operations. The critical area is protected because the presence of vehicles / or aircraft inside its boundaries will cause unacceptable disturbance to the ILS signal-in-space.
2.2 ILS Sensitive Area: An area extending beyond the ILS critical area where the parking and/or movement of vehicles, including aircraft, are controlled to prevent the possibility of unacceptable interference to the ILS signal during ILS operations. The sensitive area Airports is protected to provide protection against interferences caused by large moving objects outside the critical area but still normally within the airfield boundary.
2.3 Low Visibility Procedures (LVP): Specific procedures applied at an aerodrome for the purpose of ensuring safe operations during Categories II and III approaches and/or low visibility take-offs.
Note: as per para 5.3 of CAR on All Weather Operations, an operator shall not conduct Take-off with RVR/Visibility less than standard CAT-I conditions of 550m RVR/800m Visibility unless low visibility procedures are enforced.
2.4 Manoeuvring Area: That part of an aerodrome to be used for the take-off, landing and taxiing of aircraft, excluding aprons.
2.5 Movement Area: That part of an aerodrome to be used for the take-off, landing and taxiing of aircraft, consisting of the manoeuvring area and the apron(s).
2.6 Runway Visual Range: The range over which the pilot of an aircraft on the centre line of a runway can see the runway surface markings or the lights delineating the runway or identifying its centreline.
2.7 Safeguarding Procedures: Safeguarding Procedures (SP) are instructions for relevant airport departments and airside operators to prepare ground services and facilities for low visibility operations, in order that when LVP are implemented all SP are complete and airport is configured for Low Visibility Procedures and Low Visibility Take-offs.
2.8 Missed approach procedure: - The procedure to be followed if the approach cannot be continued.
2.9 Aerodrome Operating Minima- The limits of usability of an aerodrome for:
a) take-off, expressed in terms of runway visual range and / or visibility and, if necessary, cloud conditions.
b) landing in 2 D instrument approach operations, expressed in terms of visibility and/or runway visual range; minimum descent altitude/height (MDA/H) and, if necessary, cloud conditions; and
c) landing in 3D instrument approach operations, expressed in terms of visibility and/or runway visual range and decision altitude/height (DA/H) appropriate to the type and/or category of the operation.
2.10 Touchdown Zone- The portion of a runway, beyond the threshold, where it is intended landing aeroplanes first contact the runway.
2.11 Visibility- Visibility for aeronautical purposes is the greater of:
a) the greatest distance at which a black object of suitable dimensions, situated near the ground, can be seen and recognized when observed against a bright background.
b) The greatest distance at which lights in the vicinity of 1000 candelas can be seen and identified against an unlit background.
Note 1. The two distances have different values in air of a given extinction coefficient, and the latter b) varies with the background illumination. The former a) is represented by the meteorological optical range (MOR).
Note 2. The definition applies to the observations of visibility in local routine and special reports, to the observations of prevailing and minimum visibility reported in METAR and SPECI and to the observations of ground visibility.
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