Vetus thrusters are renowned for their durability. The equipment is your best bet when you require a stern or bow thruster to improve the manoeuvrability of your boat at low speeds or in shallow waters. Below is a step-by-step guide on how to purchase a Vetus thruster for your boat.  Type Of Thruster Internal or tunnel thrusters are fixed in a hole inside the bow and stern. They have minimal drag and are less prone to damage.