Dragon Ball - episode 49 - 03 Feb, 1987

General Blue continues to chase Bulma, Goku and Krillin in their submarine. He resorts to ramming them into the cave walls. Meanwhile, Master Roshi is having a bit of trouble with an aggressive Launch. As Launch turns back into her gentle self, Captain Dock's flying circus approaches and lands on the island. Roshi mocks the Captain and does a surprise attack on the men, aggressive Launch finishing it off. Goku, Bulma and Krillin narrowly escape Blue's subs and surface into a long dark tunnel. Goku finds a button and lights up the tunnel. At the sight of a skeleton, Krillin confirms the place is the Pirates' hideout. Hearing that the legend is true, General Blue has new ideas. (Source: Wikipedia)