6 9x13 cakes torted, filled and stacked. The top deck is cardboard covered in black fondant. The bridge was RKT covered in gum paste. The planes are molded chocolate. This was a very scary cake for me because I was so worried I was going to mess up someones one and only Navy retirement cake. In the end I learned a lot, it could have been better but I was happy with the result. Thanks for everyone on here who helped me out.