Quarter Sheet Blocks

The single blocks to be seen on some fore-and-aft vessels secured to eye-bolts in the deck on the quarters. Through these blocks the main sheet reeves in addition to the boom and traveller blocks, and are used for securing an additional purchase on the boom. When fitted this way the bight of the sheet is rove through the boom and traveller blocks, and the two hauling ends lead through these quarter blocks and make fast on the quarter bitts.