Welcome to Ratchet & Clank Answers Wiki. What would you like to know?

Which part?

The first time, you have to hoverboot past Azimuth, push one of the platforms with your Tether and then get into the water as quickly as possible. After, you must jump on the Hydroplant and hover over to the pipe which you cling onto until you reach the water.

In the next encounters with Tetramites, Azimuth will tell you what to do.