▁was ▁announced ▁on ▁ 2 ▁October ▁ 2 0 0 9 ▁that ▁Gu ern sey ’ s ▁air port ▁run way ▁and ▁apr on ▁would ▁be ▁extens ively ▁re built ▁at ▁a ▁then - est im ated ▁cost ▁of ▁£ 8 1 ▁million . ▁Although ▁Gu ern sey ▁is ▁largely ▁autonom ous , ▁it ▁has ▁to ▁obey ▁the ▁United ▁Kingdom ▁Civil ▁A viation ▁Author ity ▁reg ulations . ▁The ▁C AA ▁ins isted ▁that ▁extended ▁run way ▁end ▁safety ▁areas ▁( RES As ) ▁be ▁introduced ▁and ▁that ▁the ▁then - ex isting ▁hum p ▁in ▁the ▁run way ▁be ▁removed . ▁The ▁physical ▁run way ▁length ▁was ▁therefore ▁to ▁be ▁increased ▁by ▁ 1 2 0 m ▁at ▁the ▁western ▁end . ▁However , ▁this ▁extension ▁is ▁designated ▁as ▁an ▁R ES A . ▁The ▁significance ▁of ▁having ▁only ▁a ▁ 1 4 6 3 m ▁run way ▁is ▁that ▁even ▁relatively ▁small ▁commercial ▁jet ▁aircraft ▁in ▁the ▁Air bus ▁A 3 2 0 ▁family ▁or ▁Bo eing ▁ 7 3 7 ▁Classic ▁families ▁cannot ▁operate ▁from ▁Gu ern sey ▁at ▁maximum ▁take - off ▁weight ; ▁more ▁recent ▁and ▁larger ▁Bo eing ▁ 7 3 7 ▁Next ▁Generation ▁aircraft ▁cannot ▁effectively ▁operate ▁from ▁Gu ern sey ▁at ▁all . ▁The ▁reason ▁is ▁that ▁in ▁the ▁early ▁years , ▁many ▁aircraft ▁had ▁more ▁than ▁two ▁engines ▁generally . ▁While ▁in ▁the ▁' 6 0 s ▁and ▁' 7 0 s ▁the ▁engines ▁were ▁we aker ▁than ▁today , ▁alongside ▁them ▁adding ▁weight