The Imperial class war brig is a limited edition ship available from shipyards. The layout differs from a normal war brig. Imperial class ships have one of the following adjectives in their names: Audacious, Colossal, Conquering, Courageous, Dauntless, Defiant, Devastating, Formidable, Glorious, Goliath, Illustrious, Implacable, Impregnable, Indefatigable, Indomitable, Intrepid, Invincible, Irresistible, Majestic, Resolute, Royal, Sovereign, Superb, Thundering, Tremendous, Triumphant, Valiant, Venerable, Victorious.