Battlefleet Koronus is an extensive sourcebook for the Warhammer 40,000 Rogue Trader Roleplay Game, covering the myriad starships traversing the Koronus Expanse. It also provides a host of enemy starships to challenge Explorers, and it delves into the rich history of the Imperial Navy and Battlefleet Calixis. With new rules on Nova Cannons, torpedoes, attack crafts, and squadrons, plus new options for outfitting player ships, this book is perfect for players and GMs alike!