Here's something you don't see everyday. This is ONR bulkhead flat 2012 used extensively for Maintenance of Way service. Until now (March 2003). Due to the rebuilding of APU 205 (the only ONR APU with a Detroit Diesel in it), ONR decided that an extra APU would be necessary for Little Bear Service and this is it. After a bit of rebuilding to the car (plug ins on one car end and handrails), a rented Caterpillar generator and an air compressor are installed onto the flat car. This unit as of April 2003 has only made one test ride on the Little Bear.