904 Alpha Romeo who art thou?
N904AR is a cargo variant of the Boeing 747-400, known as the B 747-400 ERF — ERF for Extended Range Freighter. The ERF is purpose-built for air cargo duty lacking passenger windows save a few on each side of the upper deck. The main deck can have seats fitted should they be required. The most notable feature is the upwardly swinging nose for speedier loading of the main deck or for long cargo items. The aircraft featured in this post was recently at MIA and is operated by Centurion Cargo.