Dragon Ball Manga Vol.6 Chapter 70: Bulma's Big Mistake!

   

 Summary

As Gokū and Bulma drive Kintoun to the next Dragon Ball, unbeknownst to them, the Red Ribbon Army follows their movements and Commander Red is amazed at the speed at which Gokū travels. Red then informs General Blue of Goku's impending arrival. Bulma is eventually able to track down the Dragon Ball's location and she and Gokū land on the island.
They then discover that the Dragon Ball is probably underwater. When this leads to Gokū offering to swim underwater, Bulma states that it is an underwater capsule, only to be shocked that she inadvertently took her father's pod. She then opens her father's capsule to realize that it is full of dirty magazines, leading her to tear them apart in exasperation.
Gokū then decides to swim underwater, but is unable to find the Dragon Ball. As the boy walks away, wondering about Bulma's whereabouts, she is chased and shot by the Red Ribbon Army, leading Gokū to eliminate both pursuers. The boy then reveals to Bulma that he thinks the Kame-Sennin has a capsule that can send them underwater and that they should head to Kame's house, much to Bulma's annoyance.