Abstract: An improved releasable boat anchor of the double-acting type for anchoring a boat and for releasing itself from an underwater obstruction in which the anchor may be captured, the anchor comprising a fluke body and a shank, the shank comprising an intermediate portion pivotally connected to the fluke body and an outer portion pivotally connected to the intermediate portion, the outer shank portion having an aperture for attaching an anchor line to the anchor, the anchor having two alternate anchor drag positions, an intermediate release position and a full release position, said anchor including an arrangement such that in the full release position the pull on the fluke body is substantially from the rear thereof.