Module 3 - Anchorwork
Anchor Types
Fluke, plough, scoop and claw are useful recognition categories. Broad flukes can develop holding area in suitable sand or mud; plough and scoop forms aim to penetrate and align under load; claw forms use a different geometry. Weed can prevent penetration, very soft mud may need more area, and rock can turn a normal set into an unpredictable hook. Exact models within a category can behave differently.
Treat the anchor as one part of a load path. Check the manufacturer's size and use guidance, anchor condition, shank and roll features, shackles or swivel, chain and warp size, chafe protection, bow roller, securing arrangements, windlass or manual recovery, snubber and the accessible bitter end. RYA training-vessel checks inspect anchor mass, chain, warp and secure stowage rather than accepting a brand name alone.
A second anchor can provide a different size or geometry and a recovery option, but it is not useful if its rode, fittings or deployment plan are incompatible with the vessel. Before changing equipment, use the vessel and equipment manuals and competent advice. This lesson supports recognition and decision-making; it does not specify a replacement anchor for a real yacht.
| Geometry cue | What it may help with | Boundary to verify |
|---|---|---|
| Broad flukes | Large bearing area after penetration in a compatible bottom | Weed, rock, very soft mud, resetting and deck stowage vary by model |
| Plough or scoop form | Penetration and alignment under the intended load direction | Exact geometry, roll behaviour, bottom and shank compatibility matter |
| Claw form | A recognisable alternative geometry used on many cruising yachts | Do not infer universal holding or resetting from the category name |
| Kedge or second anchor | Backup, warping or a different-bottom option where appropriate | It needs its own suitable rode, fittings, stowage and deployment plan |
Common questions
Which anchor type is best for sand and mud?
Several fluke, plough, scoop and claw designs can work in compatible sand or mud when correctly sized and set. Check the exact maker's guidance, vessel system and bottom rather than relying on the category alone.
Do modern anchors mean you can use less scope?
No. A design may penetrate or reset differently, but scope, depth, bottom, load, sea room and the maker's guidance still govern the anchoring plan.
Why are weed and rock difficult bottoms?
Weed can prevent flukes reaching the seabed, while rock can produce an uncertain hook or foul the anchor. Neither description predicts a dependable set without verification.
Optional quick check
Section 2 of 4
Which statement about common yacht-anchor types is most defensible?
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Sources and factual review
Reviewed 20 August 2026 - Day Skipper Revision.
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