 The brothers went on an expedition to Spitsbergen in 1956 to conduct further surveys . Their initial observations concluded that <unk> , the outermost part of <unk> , was the best @-@ suited place for a major airport . They initially planned for a 1 @,@ 600 @-@ meter ( 5 @,@ 200 ft ) long runway , which could easily be expanded to 3 @,@ 000 meters ( 9 @,@ 800 ft ) . Hotellneset and Adventdalen , both close to Longyearbyen , were rejected because the areas were too small and due to poor weather conditions . 
