S1·E46 Bulma's Bad Day

Bulma and Goku arrived at the middle of the sea. This was General Blue’s territory, where he’s searching for the Dragon Balls! Dropped into the sea by Bulma from a nearby island, Goku dives, but it is very deep and he can’t hold his breath! Left on her own, Bulma wanders around the island trying to buy capsules, but it turned out there was a Red Ribbon Army base there!! Goku comes running and defeats the soldiers who are assaulting Bulma!! Goku suggests that they borrow a submarine from the Turtle Hermit.