Further down, ships were arranged into battle groups. UNSC ships were organized into fleets specifically numbered expeditionary fleets and named defensive fleets. Tactical Groupings Main article: UNSC Navy tactical formations
Paris-class frigates in 'Shield' formation.
The UNSC Department of Commercial Shipping operated its own identification codes for freighters that were primarily used in COM transmissions. Some warships also used the UNSC REG system, which was also a special serial number. There was also the ship emblem, which was a unique image that crew wore on their uniforms. There was the Hull classification symbol, which gives each ship a letter classification and a number. These orginizations as well have ways of identifying their ships. The UNSC Department of Commercial Shipping also operated a number of Freighters. In the case of the UNSC Swift Justice, it was operated by the Incident Response and Investigation division of the UNSC. UNSC Navy ships were deployed by UNSC Fleet Command. Warships like the UNSC In Amber Clad were often operated by the UNSC Navy. In the UNSC, ships can also be operated by different departments and branches.
