Actually this story is more about the chain than anchors. And all obervations are infuenced by the weight of your yacht, deep or swallow anchoring, multi hull and a few other parameters.
Take our SW1260, supplied for a circumnavigation, she weighs, all in, about 26.500 lbs or 12.000 kg and is in most tables a 42´ heavy. Calculations and reference tables are done with 30 knots, 7 bft, wind.
|46’–50′||41’–45′||37’–40′||5/16″ or 8mm|
|51’–60′||46’–54′||41’–48′||3/8″ PC/BBB ~ |
10 mm grade30
or 5/16″ G4
~ 8mm grade43
( Light, Medium, Heavy)
Maxwell HRC8 Windlasses
The standard windlass is a Maxwell HRC8 which is able to handle 5/16″ BB, 5/16″ ISO G4, 8mm DIN 766, 8mm ISO 4565. For 10mm, 3/8¨ chain a H10-model is necessary.
Chain Length and Grade
Oké let’s start with the basics, old fashion is a 7 to 1 ratio on chain length to depth. With modern anchors, it’s 3 to 1 for calm and or swallow anchoring up to 5 to 1 for a rougher, deeper anchoring, is oké. So the upgrade from Seawind to 80 mtr is on a lower limit. I prefer 100 meters of chain.
I think that the standard chain Seawind offers is Grade L aka PC/BBB/grade30 and again on the lower limit. In my opinion grade43 should be the standard and I prefer grade70. See the table for strength and weight and prices. (In Holland, prices in Q1 2022)
|grade (8 mm)||WLL in kg||BLL in kg||gewicht kg/m||€/m (ex VAT)|
|43||1200||4400||1,4||7,77 – 9,83|
|70||3200||7000||1,4||9,87 – 20,50|
|3000||6200||1,4||37 – 40|
|30 (10 mm)||1275||5100||2,3||11,61|
So my strategy is upgrading to the Seawind option of 80 mtr standard chain. It will last a year. Afterwards I would order 100 mtr (DIN 766, Ø 8 x 24 mm) chain grade 70 or 43. Far stronger and enough length for my sailing area, the Pacific. Buying a 8 mm higher grade chain is always less expensive than upgrading to a HCR10 Maxwell and 10 mm chain, grade 43.
Modern plow or scoop anchors (Excel, Delta, Spade, Mantus, Manson perform well compared to an older plow like CQR or a claw anchor like a Bruce or a Danforth anchor like a Fortress.
I would strongly advise to upgrade from the standard 45 lb CQR anchor to a 48 lb Sarca Excel No 5 galvanised anchor. The Excel anchor is well known for its good initial setting on a relatively short chain and its holding power. The big question is what is the right size anchor, I find this article on the UK site of Jim Green helpful.
|Sarca weight (kg/lb)||16/35||22/48||30/66|
I am comfortable with the Sarca Excel #5 and find it a balanced solution with a Maxwell HCR8 windlass and a 8 mm chain, grade 43.
We opted for the secondary anchor, a nice 35 lb Delta to be used as stern, tandem or temporary anchor.
Other important stuff
Buy an anchor swivel, always a pleasure to position the anchor on the bow roller. Most swivels attach directly to the anchor, using a bit of blue lock-tide. On 8 mm chain you use a 10 mm swivel. Almost all modern swivels like Mantus, Ultra, Lewmar are stainless steel and corrode your anchor and chain. Swivels are expensive. Rex Francis, designer of the Sarca Excel is not a fan of swivels because of lesser resetting of the anchor and lateral forces breaks swivels. Something to think about.
Buy the Anchor Bridle, it´s not an option. To release the tension of the chain from the windlass, you need an anchor bridle. I prefer nylon double braided because of its quality to stretch and flex.
Length indicators, 1 white tie wrap = 10 mtr of chain, 2 tie wraps etc. Or buy any fancy indicator.
Have a 8 and a 10 mm high quality Bow shackle with you. Always handy when something brakes. I also like a Kong Stainless Steel Universal Chain Lock
And I always carry a spare chain hook. A RVS hook will get bent and forged one breaks.