Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Dornier Do 24 -  The Dornier Do 24 is a 1930s German three-engine flying boat designed by the Dornier Flugzeugwerke for maritime patrol and search and rescue. According to Dornier records some 12000 people were rescued by Do 24s during its flying career. A total of 279 were built among several factories from 1937–1945.
Mean Of Transportation