The danforth or fluke anchor uses a stock at the crown to which two large flat triangular flukes are attached. The stock is hinged so the flukes can orient toward the bottom (on some designs they may be adjusted for an optimal angle, depending on the type of bed). Tripping palms at the crown act to tip the flukes into the seabed. The fluke anchor has difficulty penetrating kelp and weed-covered bottoms, as well as rocky and particularly hard sand or clay bottoms.
