Opening main ports would be nice, but those look a lot smaller than the standard fixed ports.
Either they were done as a special order at the factory, or somebody did a lot of
fiberglass work to reduce the opening sizes in the cabinhouse and liner.
Also, there seemes to be something strange about the trailing edge of the mast.
Behund-the-mast roller furling main?
Alma, where did you get that picture? I notice that it has a Maryland registration
number, and I wonder if she's anywhere close to me?