Design Team Beta developed aquatic vehicles and weapons for the Imperial Army, being responsible for some of Hydrospeare most renowned products, including the Explorer Submergible, the Imperial seatrooper armor (after consulting with Dr. Nashiak Llalik) and the AT-AT swimmer (although this last one was developed alongside with Kuat Drive Yards).
Due to the quality of Design Team Beta's products, the Empire provided Hydrospeare with two dozen of new projects around 2 ABY, leading some Rebel officers to believe that the Empire was trying to recover Mon Calamari.