Anchoring & Mooring

Images and videos of scoop-style anchors (a Mantus is shown here) and similar anchors while set in a soft sand bottom, show that angle that the fluke forms with the seabed when set can be less than the ideal of 30 degrees. Practical Sailor testers hope to determine if this characteristic is limited to certain designs, how significantly it affects ultimate holding power, and what can be done to create a more favorable setting angle.

An Inquiry into Anchor Angles

Comparing fluke angle and setting ability.

Designers of boat anchors deal in a handful of variables. The holding capacity of an anchor derives from its fluke, particularly the fluke’s size, shape, and the angle it makes with the shank. Other parts of the anchor—shank, roll bar, and stock—allow the fluke to set and hold as the designer intended. Based on the shapes and relationships between these components, an anchor fits into one of several broad categories: fluke (Danforth, Fortress, Manson Racer), plow (CQR, Delta, Kobra, SARCA Excel), claw (Bruce, Lewmar Claw, Manson Ray, Super Max), or fisherman (Luke).

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