NCAA, NAMA, Review 18 Airports Operating Weather Minima

The Nigerian Civil Aviation Authority (NCAA) and the Nigerian Airspace

Management Agency (NAMA) have carried out a review of aerodrome

operating weather minima for 18 airports in the country.


The General Manager, Public Relations, (NCAA,)  Mr Sam Adurogboye, made

this known in a statement issued on Wednesday in Lagos.


Adurogboye said the review was in compliance with the provision of

Part 8 of the Nigerian Civil Aviation Regulations (Nig.CARs Part 8),

and in accordance with International Civil Aviation Organisation

(ICAO) Doc.9365.


“In this review, the regulatory authority took cognizance of

improvements in visual and navigational aids within the affected



“The reviewed aerodrome operating minima will serve to enhance the

operating capacity of the aerodromes.


“This is due to the fact that it will avail the operators with

improved minima for low visibility operations.”


Adurogboye said according to the review, the landing minima specified

for all the 18 airports were determined based on applicable criteria

as defined in the ICAO PANS-OPS Doc. 8168 and Doc.9365.


He said they included all relevant amendments as well as available

navigational facilities (ILS, VOR/DME) or PBN Navigational

Specification (RNAV/GNSS).


“On the other hand, the reviewed operating minima provided for a

performance based takeoff for the affected aerodromes in Nigeria are

determined by available visual aids for takeoff.


“These are Runway Centre Lights, Touchdown Zone lights, Runway Edge

Lights, Threshold Lights, Runway End Lights and Runway Surface



“The 18 aerodromes where the operating minima and takeoff minima has

been reviewed are Lagos, Abuja, Kano, Port Harcourt, Calabar, Dutse,

Eket and Enugu.


“Others are Gombe, Ilorin, Kaduna, Katsina, Kebbi, Owerri, Sokoto,

Uyo, Yola and Zaria,” Adurogboye added.


He said it should be noted that the last time weather minima were

actually reviewed was in 1983.


“However, a semblance of revision undertaken in 1993 only stated that

the takeoff minima will be equal or greater than landing minima at all



Adurogboye said this was to allow for an air return to the same

airport should there arise an emergency.


“However, this present review allows for takeoff as low as 150 metres

Runway Visual Range (RVR).


“While some airports in the country with Category Two Instrument

Landing Systems (ILS Cat II) can permit landing with 300 metres Runway

Visual Range (RVR).


“Before this review, the lowest visibility with Category Two ILS in

the nation’s airports was 800 metres/550 RVR (Runway Visual Range).


Adurogboye said based on the review, the Abuja, Lagos, Kano, Port

Harcourt, Kaduna, Ilorin, Gombe, Owerri, Sokoto, Uyo, Yola, Dutse,

Calabar and Enugu airports now had ILS Cat II Approach and Landing



He said the implementation of these revised aerodrome operating minima

(both takeoff and landing) would be based on compliance with

applicable Standard Operating Procedures for Low Visibility Operations

at the affected airports.


“This is executed by Flight Crew, Air Traffic Controllers (ATC),

Aerodrome Operators and the Meteorological Agency.


“To ensure the seamless operation of these revised minima, the

Nigerian Meteorological Agency (NiMET) shall continue to ensure prompt

and regular provision of required meteorological information.


“These will include flight visibility and Runway Visual Range (RVR)

values to all ATC units in the airports.


“Thus NiMET and NAMA shall ensure constant updating of the Automatic

Terminal Information Service (ATIS) with the available RVR values as

appropriate,” Adurogboye said.


He said all airlines, aerodrome operators and air navigation service

providers were required to ensure adequate training of their personnel

and flight crew that would be involved in low visibility operations.


Adurogboye said the air navigation service provider was expected to

ensure regular flight calibration of all available navigational aids.


He said this was to ensure safe and efficient flight operations,

especially during low visibility operations.


Adurogboye said the NCAA would continue to provide a proactive

regulatory oversight that would ensure safety and security of all

flight operations.