What anchor size and chain length suit a Najad 361?

For a Najad 361, I would choose a 20 to 25 kg modern anchor with 50 metres of certified 10 mm short-link galvanised chain, provided the bow roller and windlass can handle it. For mainly shallow Danish anchorages, 40 to 45 metres can suffice; for deeper Scandinavian cruising, consider 60 metres and calculate scope from the bow roller to the seabed.

Check the existing gear

Identify the windlass gypsy and its specified chain size and calibration. Even chain of the correct diameter can jump or jam if the link dimensions do not match. Buying by diameter alone can be an expensive mistake.

The Najad 361 weighs roughly eight tonnes before cruising stores, with the loaded weight depending on equipment and tank contents. Size the anchoring system for the loaded boat and expected exposure. She is no lightweight 36-footer.

• Read the gypsy markings and check the windlass manual for the required chain specification.
• Inspect the bow roller, spindle, windlass mounting and backing plates for wear, movement or corrosion.
• Check that the proposed anchor clears the stem and furling gear, and can be secured firmly underway.
• Check locker depth: chain must fall clear beneath the windlass without piling up and stopping retrieval.

Keep hands and feet clear of the chain and gypsy. Isolate the windlass before clearing a jam.

Choose an anchor with reserve

A 20 to 25 kg modern anchor is a sensible cruising choice. Check the physical fit of models such as the 20 kg Rocna Original, 20 kg Spade S100 and 25 kg Mantus M1. Their shapes and stowage requirements differ, so use a manufacturer's template or trial-fit the actual anchor before ordering.

I would favour the upper end for extended cruising, frequent overnight anchoring or exposed locations, provided the handling gear can cope. Experienced long-distance sailors often carry substantially more anchor than the minimum sizing chart suggests; some choose double the recommended weight. That provides extra reserve, but does not mean every manufacturer's recommendation needs doubling.

Extra weight helps, but anchor design and seabed penetration remain decisive. A large anchor clogged with weed will still drag. Sand and suitable mud generally offer better holding than rock, thick weed or a thin covering over hard ground.

Choose chain size and length

Certified 10 mm chain is a conservative choice for this boat, particularly if retaining a compatible existing windlass. Specify a recognised marine chain grade, such as Grade 40, with documented strength and the exact calibration required by the gypsy. Diameter alone does not establish strength.