Why is a long splice used for an anchor or mooring line?

A long splice is employed in anchor or mooring lines primarily because it offers a smooth, tapered transition between two lines. This design allows the spliced section to pass through sheaves or blocks with reduced resistance and without snagging, making it more effective in systems that involve block and tackle. The gradual taper of the long splice minimizes bulk and potential hang-ups when the line runs through these mechanical systems, ensuring smooth operation when deploying or retrieving an anchor or mooring line.

The additional options, while relevant to splicing techniques generally, do not specifically pertain to the primary function of a long splice in this context. For instance, connecting two lines of the same diameter is more of a functional aspect of splicing in general rather than the specific advantage of a long splice. As for strength, while a long splice can contribute to overall integrity, it is primarily its design that enhances compatibility with block and tackle systems. Lastly, preventing chafing is a consideration in splicing but not the core purpose of using a long splice for anchoring; chafing protection would depend more on the materials and conditions of use rather than the splicing method itself.