What determines the steering mechanism in an inboard engine?

The steering mechanism in an inboard engine is primarily determined by a rudder positioned behind the propeller. When the inboard engine turns a propeller, the water flowing along the hull and around the rudder allows the operator to control the direction of the boat. The rudder acts as a vertical blade that pivots and directs the water flow, effectively steering the vessel.

This system is effective due to the way in which the rudder interacts with the water flow generated by the propeller, allowing for precise navigation. The other options do not represent the typical steering mechanisms associated with inboard engines: a jet of water is more common in jet drive systems and does not provide the same directional control; a steering wheel at the bow doesn’t provide direct control over the direction of the vessel's movement; and the angle of the sails is related to sailing vessels and not inboard engine operations.