 Lazy jacks are most commonly associated with Bermuda rigged sails, although they can be used with gaff rigged sails and with club-footed jibs.Blocks and rings may be part of some lazyjacks.The oyster dredging sailboats of the Chesapeake Bay, bugeyes and skipjacks, were inevitably equipped with lazy jacks, as their huge sail plans, combined with the changeable conditions on the bay, made it necessary to be able to reef quickly and with a small crew.