one car remaining in NJ TRANSIT's Meadowlands Maintenance Complex. Metro-North also owns two Comet III cab cars, which were originally numbered 5179 and 5180. These cars were sold to NJT in 1998 and renumbered to 5009 and 5010, but were later sold back to Metro-North in 2008. Comet IV The Comet IV cars, delivered in 1996 and purchased for NJ Transit's new Midtown Direct service, are similar to the Comet III cars, except they have no door by the engineer's cab and have thicker stripes. The Metro-North Shoreliner IV fleet is a variation without long doors. With the completion of the Comet V order, all Comet IV cab cars are no longer allowed to lead a train; their cab controllers have since been deactivated. Instead, they are now used exclusively as blind coaches, in which they are inserted into a train consist and act as regular trailer cars. Comet V These cars were ordered in 1999 by NJ Transit and Metro-North Railroad and delivered between 2002 and 2004. Unlike previous series which were built by Bombardier, the Comet Vs were built by Alstom. The major external differences are a stainless-steel exterior, larger windows, and visible, roof-mounted air conditioning units. "Comaro" coaches The "Comet" name was also applied to two distinct orders of coaches used on NJ Transit lines. As both orders had connections to the Arrow series of electric multiple unit (EMU) cars, they have become known as "Comaros", a portmanteau of "Comet" and "Arrow", and a play on the Chevrolet Camaro. Comet IA Ten Comet IA cars (two cabs and eight trailers) were built in 1978 by General Electric for the MTA from surplus shells from Avco and Canadian Vickers remaining from the "Arrow III" EMU fleet built for NJDOT. They saw use primarily on the Port Jervis Line. These cars were retired in 2004 and scrapped by 2006. Comet IB The Comet IB cars were rebuilt from 30 former Penn Central Arrow I EMU cars originally built by the St. Louis Car Company between 1968 and 1969. The Arrow I cars suffered from chronic mechanical problems and were out of service by 1980. The cars sat unused for several years, but realizing that the car bodies still had many decades of service left on them, NJ Transit made the decision to have them rebuilt into un-powered coaches. In 1987 and 1988 the cars were converted into cab control