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• No Aircraft shall take lock turn/ pivotal turn on the Runway to avoid pavement damage.
LOW VISIBILITY PROCEDURES,
IMPHAL AIRPORT, IMPHAL (VEIM)
1.INTRODUCTION
1.1Until the latest amendment of DGCA Civil Aviation Requirements (CAR) Section 8, Series ‘C’, Part-I on All-Weather Operations, Low visibility procedures were required at aerodromes for the purpose of ensuring safe operations during Categories II and III approaches and/or low visibility take-offs (LVTO).
1.2However, in latest amendment to CAR (Rev. 10), para 5.3, following provision regarding Low visibility procedures is added. “An operator shall not conduct takeoff with RVR/visibility less than standard Category I conditions of 550m RVR/800 m visibility unless low visibility procedures are enforced”.
1.3This provision necessitated the need for low visibility procedures for accommodating/permitting departures in Visibility/RVR less than 800M/550M even at such airports where there are no CAT II and CAT III operations.
1.4As per provisions of Aerodrome Design and Operations CAR and ICAO Annex 14, Runway centre line lights are required for take-off in RVR below 400 M. Further, as per Aerodrome Design and operations CAR para 9.8.7, Surface Movement Radar (SMR) need to be provided at an aerodrome intended for use in Runway Visual Range conditions less than a value of 350 M
1.5Accordingly, Low visibility Procedures have been developed for Imphal Airport to accommodate/permit departures in Visibility/RVR less than 800M/550M from RWY 04 (runway served with RVR instruments). and since, there is No SMR facility at Imphal Airport, these procedures will be applicable for take-off in VIS/RVR below 800M/550M but not less than 400 M RVR.
2PURPOSE
2.1The purpose of this document is to define the Standard Operating Procedures for Low Visibility operations at Imphal Airport.
3SCOPE
3.1 This is applicable to all the concerned personnel involved in the Low Visibility Operation as mentioned in this SOP.
3.2 The Low Visibility Procedure (LVP) describe the procedures and actions that are required to be taken by the Air Traffic Control (ATC), Pilots, Airline Operators, MET dept, Vehicle Operators, Airport Operations, Electrical Engg., CNS, Airport Fire Services and Ground Handling Agencies during Low Visibility Take-Offs at Imphal Airport
3.3 The procedures contained in this document shall be read in conjunction with other applicable ICAO DOCs and Annexes / DGCA CARs and relevant circulars, AAI CHQ/RHQ instructions on the subject issued from time to time.
4 DEFINITIONS
4.1 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 2D 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
4.2 Instrument approach operations (Annex 6): An approach and landing using instruments for navigation guidance based on an instrument approach procedure. There are two methods for executing instrument approach operations:
a) a two-dimensional (2D) instrument approach operation, using lateral navigation guidance only; and
b) a three-dimensional (3D) instrument approach operation, using both lateral and vertical navigation guidance
Note - Lateral and vertical navigation guidance refers to the guidance provided either by:
a) a ground-based radio navigation aid; or
b) computer-generated navigation data from ground-based, space-based, self-contained navigation aids or a combination of these
Instrument approach operations shall be classified based on the designed lowest operating minima below which an approach operation shall only be continued with the required visual reference as follows:
a) Type A: a minimum descent height or decision height at or above 75 m (250 ft); and
b) Type B: a decision height below 75 m (250 ft). Type B instrument approach operations are categorized as:
i) Category I (CAT I): a decision height not lower than 60 m (200 ft) and with either a visibility not less than 800 m or a runway visual range not less than 550 m;
ii) Category II (CAT II): a decision height lower than 60 m (200 ft) but not lower than 30 m (100 ft) and a runway visual range not less than 300 m;
iii) Category III (CAT III): a decision height lower than 30 m (100 ft) or no decision height and a runway visual range less than 300 m or no runway visual range limitations
4.3 Decision Altitude/Height: A specified altitude or height in a 3D instrument approach operation at which a missed approach must be initiated if the required visual reference to continue the approach has not been established.
Note: Decision altitude (DA) is referenced to mean sea level and decision height (DH) is referenced to the threshold elevation
4.4 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.
4.5 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 is protected to provide protection against interferences cause by large moving objects outside the critical area but still normally within the airfield boundary
4.6 Low Visibility Procedures: Specific procedures applied at an aerodrome for the purpose of ensuring safe operations during Categories II/ 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.
4.7 Low Visibility Take-Off (LVTO): A term used in relation to flight operations referring to a take-off on a Runway where the RVR is less than 400m.
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