Dragon Ball Episode 48: Deep Blue Sea
Episode 48 of 153 of Dragon Ball, aired January 28, 1987, 25 minutes. Available with English subtitles and dub where released.
Episode summary
Krillin manages to manuever the air/sub ship to the location where the dragonball is. General Blue plans to tail Goku, while another squad heads to Roshi's Island. Despite their searching, Bulma, Krillin and Goku don't find the dragonball on the ocean bed. Meanwhile General Blue prepares and launches all his forces. As Krillin drives the sub into a cave, General Blue's submarines tail and attack them. Krillin makes it to narrower caves, but General Blue sends his minisubs to pursue them.