this basic design: the bay window is known as a lookout or ducket. Extended-vision In the extended-vision or wide-vision caboose, the sides of the cupola project beyond the side of the car body. Rock Island created some of these by rebuilding some standard cupola cabooses with windowed extensions applied to the sides of the cupola itself, but by far, the greatest number have the entire cupola compartment enlarged. This model was introduced by the International Car Company and saw service on most U.S. railroads. The expanded cupola allowed the crew to see past the top of the taller cars that began to appear after World War II, and also increased the roominess of the cupola area. Additionally, Monon Railroad had a unique change to the extended-vision cabooses. They added a miniature bay to the sides of the cupola to enhance the views further. This created a unique look for their small fleet. Seven of the eight Monon-built cabooses have been saved. One was scrapped after an accident in Kentucky. The surviving cars are at the Indiana Transportation Museum (operational), the Indiana Railway Museum (operational), the Kentucky Railway Museum (fire damaged), and the Bluegrass Railroad Museum (unrestored but serviceable). The remaining three are in private collections. Transfer A transfer caboose looks more like a flat car with a shed bolted to the middle of it than it does a standard caboose. It is used in transfer service between rail yards or short switching runs, and as such, lacks sleeping, cooking or restroom facilities. The ends of a transfer caboose are left open, with safety railings surrounding the area between the crew compartment and the end of the car. A recent variation on the transfer caboose is the "pushing" or "shoving" platform. It can be any railcar where a brakeman can safely ride for some distance to help the engineer with visibility at the other end of the train. Flatcars and covered hoppers have been used for this purpose, but often the pushing platform is a caboose that has had its windows covered and welded shut and permanently locked doors. CSX uses former Louisville & Nashville short bay window cabooses and former Conrail waycars as pushing platforms. Transfer cabooses are not to be confused with Missouri Pacific Railroad (MoPac) cabooses, as their cabooses were fully functional. Drover's Drover's cabooses looked more like combine cars than standard cabooses. The purpose of a drover's