Tackle 2 : A system of blocks and ropes arranged to give mechanical advantage in lifting or pulling. Any sling, shackle, swivel, ring, hook or other appliance used in connection with a lifting machine or from the hook of a crane
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}