Why not use a steerable bow rudder?
In addition to the reasons listed above in the section “Why twin rudder and twin canards” the forward appendage (rudder, canard, etc.) wants to be lifted when reaching and running to produce the greatest efficiency. In summary, a configuration using twin canards combined with twin rudders produces a relatively simple configuration that maximizes efficiency and ensures the boat can be handled more easily when sailing near the limit of control.
