The term 'Former Airship' can be summed up by the crossword solution 'ZEPPELIN'. Zeppelins were a type of rigid airship named after the German Count Ferdinand von ZEPPELIN who pioneered rigid airship development at the beginning of the 20th century. They were used for both commercial and military purposes, and were the first aircraft to provide passenger service across the Atlantic Ocean. Zeppelins were eventually replaced by more efficient aircraft such as airplanes and helicopters.