QUESTION: Why is the Rudder/Skeg Combination such an important design element?
ANSWER: It is important because it results in better steering control. Tests show that having a full length skeg directly in front of the rudder, the stall angle of the rudder is substantially increased. During times when it is needed most, as in heavy seas or tight docking maneuvers, a more powerful turning moment is generated with a rudder/skeg combination.

Rudder/Skeg Combination

Caliber Rudder/Skeg System Versus Typical Rudder / No Skeg System
 
Smooth laminar flow creates strong turning moments   Stalled turbulent flow results in low turning moments
 

Equal angle of attacks

 

Equal angle of attacks