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3. SAFEGUARDING PROCEDURES:
i) Duty Air Traffic Control Officer (DATCO) will initiate and co-ordinate with all the concerned agencies for completion of
Safeguarding Procedures before implementation of LVPs.
The Safeguarding Procedures (SP) shall be initiated when: -
a) The visibility/ RVR is less than 1200m and visibility/ RVR is forecasted to deteriorate to 800m or less; and/or
b) The cloud ceiling is less than 400ft and forecast to fall to 200ft or less.
ii) Safeguarding Procedures include:
a) Stopping all maintenance works on the manoeuvring area and the associated runway/taxiway strips as well as removal of
all men and mobile equipment from the said area.
b) Ensuring availability of secondary power supply (DG)
Note: The lights may continue to operate on main power supply during Safeguarding Procedures. Whenever LVP is to
be implemented, all lights shall be put on Standby Power Supply (DG set/UPS). This operation needs to be completed
before LVP is implemented.
c) Serviceability of Aeronautical Ground Lights
Note: The Aeronautical Ground Lights must have been inspected during the hour preceding implementation of LVP and
thereafter once every two-hour period. The lighting inspections should be accorded priority.
d) Positioning of 1 CFT each at the two predetermined positions (in front of main fire station and in front of satellite fire
station on fire access road);
e) Availability of Follow-Me services for all non-scheduled aircraft.
iii) Actions by various agencies during LVP:
a) The duty MET Officer shall keep the duty ATCO informed of any change in Visibility/RVR.
b) All the towing operations shall be suspended during low visibility procedures.
c) The number of vehicles operating on the manoeuvring area shall be restricted to bare minimum.
d) Only those vehicles capable of two-way communication with ATC (fitted R/T set) shall be operated on the manoeuvring
area. In case of extreme emergency, a vehicle without two-way communication capability may be permitted provided it is
escorted by “Follow-Me” vehicle with two-way communication capabilities.
e) Since ASMGCS is not available, aircraft movement shall be restricted to two aircraft at a time on the apron and one
aircraft at a time in the manoeuvring area.
f) Once the “Low Visibility Procedures in force” the same shall be included in the DATIS.
g) DATCO shall stop all flight operations whenever RVR falls below 350m.
h) P&E team shall continuously monitor the main and standby power during LVP operations and report any unserviceability
to ATC immediately.
4. TERMINATION OF LOW VISIBILITY PROCEDURES:
i) When visibility/ RVR improves to 800m/550m or more and the cloud ceiling is 200ft or higher and trend is for
improvement, DATCO would terminate operations of LVP. DATCO may obtain advice from Duty Met Officer
regarding improvement in weather conditions before the termination of LVP.
ii) The DATCO will intimate all concerned agencies regarding the termination of LVP operations.
iii) On cancelling LVP, following message shall be included in subsequent ATIS broadcasts, “Low Visibility Procedures
cancelled”.
iv) If SPs are in force and LVP are terminated, and if the visibility/ RVR improves and is more than 1200m and/ or cloud
ceiling is 400ft or higher and both are forecast to remain above the required SP criteria, DATCO may cancel the
Safeguarding Procedures.
5. ACTIONS BY OTHER AGENCIES (AIRLINES, REFUELLING COMPANIES, ETC.):
i) All the agencies shall ensure that staff and drivers are suitably trained on Low Visibility Operations.
ii) A refresher program for ATCOs and personnel responsible for airside operations shall be conducted every year.
iii) All agencies operating in the operational area shall ensure that only those vehicles that are absolutely essential for aircraft
operations operate in the operational area during the periods of low visibility. The drivers of these vehicles shall keep a
look out for taxiing aircraft and other vehicles to prevent accidents.
iv) All vehicles must have their obstruction and hazard lights ‘ON’ during Low Visibility Procedures operations.
v) All instructions/ sign boards provided for vehicular movement area/ service roads, must be followed while operating in
the operational area.
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