The Civil Aviation Authority has announced the following:No further flights to be made by Hawker Hunter aircraft .Flying displays over land by vintage jet aircraft will be significantly restricted until further notice (displays over sea are OK). They will be limited to flypasts, which means ‘high energy’ aerobatics will not be permitted.The CAA will conduct additional risk assessments on all forthcoming civil air displays to establish if additional measures should be introduced.All air display arrangements, including the pilots and aircraft, must meet rigorous safety requirements. Individual display pilots are only granted approval following a thorough test of their abilities. Beachy Head Lighthouse was built in the sea below Beachy Head. It was 43 m (141 ft) in height and became operational in October 1902. For more than 80 years, the red-and-white striped tower was manned by three lighthouse keepers. Their job was to maintain the light, which rotates, making two white flashes every 20 seconds. It was then visible 26 nautical miles (48 km; 30 mi) out to sea. The lighthouse was fully automated in 1983 and the keepers withdrawn. In June 2010, Trinity House announced in the five yearly "Aids To Navigation Review" that the light range would be reduced to 8 nmi (15 km; 9.2 mi) and the fog signal discontinued. In February 2011, the work was undertaken and light range reduced by the installation of a new LED navigation light system. The old lens, though no longer in use, was left in situ. The fog signal was also discontinued at this time. Trinity House announced in 2011 that it could no longer afford to repaint the distinctive red and white stripes and that it would have to be left to return to its natural granite grey. It stated that because boats now have high tech navigational systems the day marker stripes are no longer essential. However, a sponsored campaign to keep the stripes was launched in October 2011. The required £27,000 was raised.