 The threat from these underwater weapons to his capital ships was too serious for him to use the fleet in an active way.Instead, Revel decided to implement a blockade at the relatively safer southern end of the Adriatic with the battle fleet, while smaller vessels, such as the MAS torpedo boats, conducted raids on Austro-Hungarian ships and installations.Meanwhile, Revel's battleships would be preserved to confront the Austro-Hungarian battle fleet in the event that it sought a decisive engagement.