Sabela 19 January 2018 Sabela 19 January 2018 Sounding the Sumburgh FoghornThe annual Foghorn sounding at Sumburgh Lighthouse, Shetland. Brian Johnson starts up the 1951Kelvin K-Series Diesel 44hp Engines. The engines power the Alley and MacLellan compressors, which in turn, power the foghorn.