Block 07 : A device with a roller through which chain or rope is passed as a turning point to facilitate moving or pulling a load; a pulley. See: Tackle
Association of Marine Underwriters of San Francisco (AMUSF), Glossary of Marine Insurance and Shipping Terms, http://www.amusf.com/Definitions_A.htm, CA, USA 2011. (Mrtm Insur and Shipping - Amer) {575}