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 paper
An anchor paper is a sample essay response to an assignment or test question requiring an essay, primarily in an educational effort. Unlike more traditional educational assessments such as multiple choice, essays cannot be graded with an answer key, as no strictly correct or incorrect solution exists. The anchor paper provides an example to the person reviewing or grading the assignment of a well-written response to the essay prompt. Sometimes examiners prepare a range of anchor papers, to provide examples of responses at different levels of merit.