Common sennit. Sennits are braided ropes of various kinds. Common sennit is made with any odd number of strands and used to make gaskets, with which sails are lashed when furled, and reef points whith which the unwanted canvas is tied when the sail is reefed. Braided rope was used as being less liable to chafe the sail. An example of ropework from a collection of demonstration knots.