What are anchor made of?
Sea anchor
Modern commercial sea anchors are usually made of cloth, shaped like a parachute or cone, and rigged so that the wider end leads and the narrower end trails. When deployed, this type of sea anchor floats just under the surface, and the water moving past the sea anchor keeps it filled. Some varieties are cylindrical, with an adjustable opening in the rear that allows the amount of braking to be adjusted when deployed.
Anchor Step
The term "anchor" was coined by the Golden State Dance Teachers Association in the early 1960s to clarify the difference between the "resistance" desired at the end of a West Coast Swing Pattern, and the lack of resistance caused by one version of the second set of triples taught circa 1961.