Hydro Propeller

The Underwater Jet, also Underwater Propulsion Unit, is one of the vehicles you can use in Tomb Raider 3, in London. The Underwater Jet is one of the most difficult vehicles to handle. Luckily it is voluntarily. You can also reach everything swimming and diving, although the Underwater Jet will make the journey much shorter and you can use it's handy weaponry.

Controls

To grab the underwater jet, just swim to the handle and press Action.
To move the underwater jet, press Jump and the Directional Buttons.
To let go press Roll and left or right.