: Hydraulic is common,and a good way to transfer wheel
motion to the rudder
without having to worry about routing of cables
. Also works well with an autopilot
. On sailboats cables
are often preferred, I suspect because the wheel
usually is close to the rudder
. Steering hydraulics are usually manual, the pump
being driven by the wheel.
Bow thruster: First, do you want one at all? If you do, then electricity is the more common solution, because this use requires an active pump
, which in turn means either running the engine
or an electric pump
, in which case why do it?
: You want one, but the same comments apply.
In all, I'd say that active hydraulic systems belong on power boats above some certain size. I've toyed with the idea, including for steering (no wheel), but doubt that I will pursue it.