In addition to his Chapter rank, each Captain also bears one or more honorific titles associated with the command of a particular company or responsibility. Some, such as and Master of the Recruits, are common titles in use across almost all Space Marine Chapters whilst others, such as the , are products of a specific Chapter's history and culture. These titles often bring with them additional duties and responsibilities. For example, the must be just that: not only a skilled commander but an expert at void warfare who looks to the upkeep, deployment and – on occasion – command of his Chapter's , and frigates. Equally, the Master of the Rites has a secondary role that tallies closely with that of the of the Reclusiam. To him falls the honour of leading many of his Chapter's most sacred rituals alongside the Master of Sanctity, and it is his responsibility to ensure that all companies are joined by a sufficient strength of Chaplains. Other titles are products of a particular Chapter's history, culture and military specialties. The Captain of the ' 4th Company is traditionally the , while the Aurora Talons Chapter, specialising in space warfare, maintains no less than five Master Bombardiers among their company Captains. The , for example, name theirs Shadow Captains, whilst the use the epithet . . Space Marine forces are generally commanded either by their Chapter Master (the leader of the entire chapter) or one of the Captains (the company leaders).. A Space Marine Captain of the Hammers of Dorn Chapter. A Captain is a senior Astartes or Primaris Space Marine officer who commands one of the 10 companies in a standard Space Marine Chapter or Primaris Space Marine Chapter that follows the dictates of the Codex Astartes..