LJLA to implement new
Global Navigation Satellite System
Liverpool John Lennon Airport (LJLA) intends to implement a new Global Navigation Satellite System (GNSS) procedure on 21st July 2016 that will replicate the current instrument approaches for aircraft landing at the Airport.
The introduction of this new system follows a consultation last year with local stakeholders to incorporate their views and thoughts of the new GNSS procedures.
The new procedure is to be used in the event that the Airport’s current Instrument Landing System (ILS) is not available, in simple terms GNSS is for aircraft what Satnav is for a car but with the main exceptions for the aviation industry being that GNSS procedures are in three dimensions. There are also significantly more safety checks of the process and procedures before they are introduced.
The GNSS has been developed jointly over the last 18 months by the Airport in partnership with its Air Traffic Service Provider, Air Traffic Control Services Limited. The new GNSS procedures will apply for a maximum of 12 nautical miles from the Airport and aim to replicate the current ILS approaches as a contingency or alternate navigation procedure, lining up aircraft with the runway and descending them on the approach glidepath safely.
There should be no overall noticeable change to the way aircraft approach the Airport with this new system, with aircraft approaching in the same way they do today with assistance from Air Traffic Controllers in order to line up on the runway centre line. The number of aircraft expected to be using the new procedure is likely to be less than 1% of all aircraft movements at LJLA.
The CAA has overall responsibility for the safety and regulation of the UK airspace and details of last year’s public consultation and the process of approval and implementation can be found on the CAA website, via the following link:
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