There were four, for it was a heavy boat, held by a double block.
A luff-tackle purchase, with a hook in the end of the single block, and a tail to the upper end of the double block.
A rope hove through a single and a double block and made fast to the single block.
The main-boom had a ring working between cheeks and carrying a double block with a single block below.
At each boom a seaman stood, and each held the double block of a boom-tackle, waiting the word that now came.
A small luff purchase with a short fall, the double block having a tail to it, and the single one a hook.
We rented one end of a double block house and school was held in the other end.
On the Flyaway this rope ran through a double block, or tackle.
The halyards should be a luff purchase, the fly-block being the double block, and the single block being hooked in the channels.