only two choices
As far I've found, there were only two choices of keel here in the states. The european models might have offered a "lifting keel" which is a swing keel by our definition. There are some Beneteau 24's (again european) that have swing keels too. You can probably say the shoal draft and the wing keel are the same. If your looking for a 235 check the link below. This is an excellent article on what to look for in a used 235.
