When first introduced, the designation of Battle cruiser was considered the most controversial annotation for Star Fleet. But other governments and various conflicts soon cemented the use of these highly specialized large combat craft. Battle cruisers do not have the multi-project research capability of other Exploration vessels, but do bring together many other aspects of standard Cruisers into a surprisingly lethal package. Battle cruisers focus most of their abilities into a combat platform designed to engage both multi-vessel units or larger single combat vessels. Battle cruisers are often more heavily armed, but are more expensive to maintain.