Note that the boom is permanently attached
to the masthead. It can also be attached to a gooseneck and track
to fine tune the center of effort. The yard is lashed to a sliding
fiberglass collar around the aluminum tube boom. The clew of the
sail is fixed to the end of the boom and when the yard is hoisted the sail's
draft can be adjusted with the halyard tension. The sail can be flattened
to a degree where a very high wind strength can be tolerated.
This is one possible reefing method.
A rectangular "sail cover" is wrapped around the spar and attached with
sail cover hardware. The excess area is bundled inside the fairing.
Here are two ways to reduce sail through
the use of zippers.
When all else fails, you can stow the yard
and hoist a jib tacked down to an eye on the gunwale. Set the mast
vertical and use the backstay to get luff tension.