Tackle refers to a weight-lifting machine typically composed of a pair of pulley-block s (one fixed, one mobile) housing sheaves, with a rope running in their grooves.

The polyspaston performs the same function as the tackle, but the sheaves are arranged end-to-end in two parallel rows instead of rotating on a common axle as in a standard block. It is also known as polyspaston

In power boating or sailing, ground tackle is defined as equipment such as anchors, chains or lines for holding fast a vessel to the bottom.