Module 3 - Anchorwork
Anchor Types
What you will learn
Recognise common yacht-anchor geometries and evaluate the complete installed anchor, rode, fittings and recovery arrangement without assuming one design is best everywhere.
Anchor names and shapes help you predict how a design may penetrate, reset or foul, but they are not a performance guarantee. Suitability belongs to the complete, correctly sized and maintained system in the actual bottom and conditions.
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 |
Assess a proposed replacement anchor
An online comparison labels a new scoop anchor 'best', but it is heavier than the bow roller rating and its shank may not stow under the pulpit. The existing chain, swivel and windlass have not been checked.
1. Define the service
List vessel size, expected bottoms and conditions, primary or kedge role, deployment method and consequence of failure.
2. Check compatibility
Verify maker sizing, bow geometry, roller, locker, chain or warp, connectors, windlass and secure sea stowage.
3. Inspect the load path
Look for corrosion, distortion, incompatible metals, side-loaded shackles, poor swivel orientation and a weak or inaccessible bitter end.
4. Plan operation and recovery
Confirm how the crew will lower, set, monitor, recover and secure the exact system before treating the replacement as an improvement.
Sense check: A higher-performing anchor on paper can make the vessel less safe if it cannot deploy, fit, connect, recover or secure correctly.
Common mistake or limitation
- Ranking whole anchor categories as universally best or worst when exact design, size, bottom, setting and load dominate the real result.
- Choosing by anchor mass alone and ignoring the chain, warp, connectors, windlass, bow roller, snubber and securing points.
- Assuming a modern design permits less scope or removes the need to verify that the anchor has set.
- Treating an anchor hooked into rock as a reliable set without considering uncertain holding and difficult recovery.
Recap
- Use geometry to ask better questions, not to declare one anchor universally best.
- Check the complete load path from seabed to the vessel, including recovery and secure stowage.
- Follow maker sizing and compatibility guidance for the exact equipment and vessel.
Optional quick check
Section 2 of 7
Which statement about common yacht-anchor types is most defensible?
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.
Keep revising this topic
Sources and factual review
Reviewed 20 August 2026 - Compass Revision editorial review.
Continue studying Anchorwork
This public lesson is part of Revision Module 3. Full revision access adds the guided Learn, Practise and Test flow, flashcards and revision progress.