The Race is On! Trouble on the High Seas!

is episode 103 of the original Naruto anime.

Synopsis
Team 7 follows Idate to another port which makes a better starting point of the boating part of the race, due to the winds and the current. En route, they are attacked by the Rain ninja from the Chūnin Exams, who have been hired by the other clan. Team 7 defends Idate and tell him to swim for the shore, while they follow later. He does so, but is confronted by Aoi, leader of the Rain ninja.