QUESTION: What is the Triple-Support Rudder System™?
ANSWER: It is a method of attaching the rudder to the hull that involves spreading loads to three key points. It is so strong that any two points could support the rudder in an emergency. The lower support, the rudder shoe, is located well above the bottom of the keel for even more protection in case of an accidental grounding.

Triple-Support Rudder System™
First Support: Anti-friction upper bearing.
Second Support: Heavy, solid cast bronze rudder stuffing box.
Third support: Solid stainless steel rudder shoe.
From "Safety Preparations for Cruising" by Jeremy R. Hood
             “When a vessel has a fin keel that does not reach to the stern, a small additional structure (skeg) can be fitted to the hull like a small keel from which to hang the rudder. The skeg design is sometimes strong and deep so that a rudder can be supported top and bottom while other designs have only a partial skeg allowing the rudder to be a balanced type.
             The skeg performs two functions. It supports the rudder and it protects it from damage. Not all skegs are designed to be sufficiently strong for ocean sailing. In my opinion, the rudder is such an important yet vulnerable part that a cruising boat needs to have a strong, full skeg if one is used. Make sure yours is. If the vessel runs over a line at sea or goes aground, a strong skeg will help protect a rudder from damage that could otherwise disable the boat.”