During the early Principate, a ship's crew, regardless of its size, was organized as a "centuria". Crewmen could sign on as marines (Called Marinus), rowers/seamen, craftsmen and various other jobs, though all personnel serving in the imperial fleet were classed as "milites" ("soldiers"), regardless of their function; only when differentiation with the army was required, were the adjectives "classiarius" or "classicus" added. Along with several other instances of prevalence of army terminology, this testifies to the lower social status of naval personnel, considered inferior to the auxiliaries and the legionaries. Emperor Claudius first gave legal privileges to the navy's crewmen, enabling them to receive Roman citizenship after their period of service. This period was initially set at a minimum of 26 years (one year more than the legions), and was later expanded to 28. Upon honorable discharge ("honesta missio"), the sailors received a sizable cash payment as well.