There are 2 unique codex entries in the Locations section on the Republic Fleet. 1 is accessible to all players regardless of class or faction and 1 is faction specific.
Carrick Station is obtained from interacting with a Clickable Plaque.
Codex type: Locations | Faction: Republic | Class: All
Associated Achievement: None
Meridian Complex Shipyard is obtained from speaking with General Daeruun during "Objective Meridian" mission.
Codex type: Locations | Faction: Both | Class: All
Associated Achievement: None