The UKLFS and its Management (Click for UKLFS map)
The UKLFS was created in 1979 to improve the system of allocating airspace for low level flying, to make sure it is distributed as evenly as possible. Air Staff at the Ministry of Defence is responsible for deciding on low flying policy. The amount of low flying will vary from year to year according to training requirements and operational commitments abroad.
The Ministry of Defence accounting year runs from April to March. For year 2005-2006 the total low flying hours flown were 44,430. In 2006-2007 37,717 hours, 2007-2008 37,795 hours and 2008-2009 36,532 hours. Each year around 40% of the hours were for fixed-wing aircraft and 60% for helicopters. Regulation and monitoring systems are in place to make sure there is the minimum disturbance to the public by low flying aircraft, whilst maintaining necessary training levels for aircrew.
Low flying for fixed wing aircraft in the UK is defined as below 2,000 feet (610m) Above Ground Level (AGL), while helicopters are considered to be low flying at 500 feet (152m) AGL. Generally the rules for low flying for experienced pilots of aircraft dictates that they must keep a Minimum Separation Distance (MSD) of at least 250 feet (76m) from the ground or any structure. Less experienced pilots must fly with 500 feet (152m) MSD. Aircrews are advised to avoid flying over large conurbations of over 10,000 people and livestock and other sensitive areas to minimise disturbance. Low flying is normally not
permitted during Bank Holidays. The UKLFS shuts down for two weeks during over the Christmas and New Year period. The MOD deploys the Skyguard radar system twelve times a year to secretly monitor low flying activity. Skyguard can record the height and speed of low flying aircraft.
The UKLFS is run by the Low Flying Operations Squadron (LF Ops Sqn), and is based at RAF Wittering. They are required to spread low flying operations around the LFA's to minimise the impact of low flying on the public. Crews book their missions in the UKLFS, often on the day of the proposed sortie. Staff will make sure that each LFA is not overloaded with aircraft. In 2007 the new Military Flight Information Management System (MFIMS) started to be rolled out to the squadrons of all three services and replaces the M-ALFINS system. MFIMS incorporates; Notices To Airmen (NOTAM), flight planning with pre-booking and the allocation process and is used
by aircrew to plan sorties. Low Flying Temporary Avoidances are also used when local events such as concerts, festivals or agricultural shows are notified.
The Low Level Civil Aircraft Notification Procedure (CANP) requires pilots of civilian aircraft to log their low flying sorties with the Low Flying Booking Cell (LFBC) at the London Air Traffic Control Centre (Military) - LATCC(Mil). This information is distributed to military operators to assist them with their flight planning.
How low can they fly?
The UK is fortunate to have areas ideal for low flying operations. The UKLFS is divided into 18 Low Flying Areas (LFA) numbered 1-19, where the British military and US military aircraft based in the UK, are cleared normally to fly down to 250 feet (76m) AGL. Speed limits apply of 450 knots (833 km/h) with a maximum limit, for attacking targets for example, of 550 knots (1,018 km/h). The UKLFS is also subject to rules regarding the weather and its effect on visibility. For any aircraft flying faster than 140 knots (260 km/h) the pilot must have at least 2.7nm (5km) of visibility, 5,000 feet (1,524m) horizontal and 500 feet (152m) of vertical
separation from cloud. Pilots are also instructed whenever possible to cross over coastlines above 500 feet (152m) to avoid large bird populations. Pilots can report high concentrations of birds to the Low Flying Booking Cell. Pilots are also instructed not to fly over the same location whenever possible more than two times during the same sortie.
The routing once at low-level is flexible, aircrews are free to avoid poor local weather conditions. Whilst some valleys are designated as 'one way' and are deemed to be 'flowed', there are generally no restrictions to where they can fly in the LFA's. Defined Danger Areas, built up areas and airfield air traffic zones are avoided of course. There are also three special low-level flying areas called Tactical Training Areas (TTA's) where low flying can be authorised down to just 100 feet (76m) AGL for fixed wing aircraft, excluding Hercules which have a 150 feet limit. Helicopters are cleared to fly down to 100 feet (30m) in normal operations.
The TTA's are designated with an individual area code, for example LFA 7T, which is within LFA 7 situated in Wales. They are only occasionally operational accounting for between 1% and 2% of all low-level flying. Area 14T (Highlands Restricted Area) situated in the Highlands of Scotland is used for training with Terrain Following Radar equipped aircraft. Air to air combat training can take place within the LFA's, in areas designated as Over-land Training Areas (OTA). There are seven OTA's (A to G), OTA Golf for example covers a good part of central Wales.
A number of military ranges are situated around the UK and are used for low-level conventional and electronic warfare training. Spadeadam in Northumberland is the most sophisticated containing a large number of realistic threat emulators. It is used regularly by fixed and rotary wing aircraft.
During exercises such as the Tactical Leadership Programs (TLP) and Qualified Weapons Instructor Courses (QWIC) NATO member countries are able to use the UKLFS.
An aircraft will handle differently at sea level in cold weather compared to high level in warm weather, as experienced in Afghanistan. Consequently low flying training is conducted frequently in North America. A Government directive requires that 60% of UK military low-level training should be done abroad. |