"The modified full-keel form features generally good handling and directional stability plus reduced wetted surface. The yachts can perform well in all conditions and, as they are generally of heavier displacement than contemporary ballasted-fin boats, they do not give away much in light air, despite the added wetted area. A yacht with a modified full keel can sail right up with the best of them if she is given sail area commensurate with her typically heavier displacement. "
"Full Keel. The keel is the part of a sailboat that is filled with ballast (weight, usually from iron or lead) to counteract the forces on the sails. Some boats have keels that are more or less bolted onto the bottom of the hull. This is fine for coastal cruisers, but not the safest arrangement for heavy-weather sailing. These keels have been known to literally fall off after striking floating objects at sea or getting caught in very rough weather. A better alternative for off-shore cruising is a "full keel." These keels are built into the hull of the boat. In fact, on Candide, it's difficult to determine where the hull ends and the keel begins...as both are constructed from the same continuous mass of fiberglass. The downsides of having a full keel are that the boat will generally be a bit slower, and the boat may not sail as well into the wind. A huge advantage is that full keel boats will generally be much more stable at sea."