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TOPIC: ROCNA anchor

ROCNA anchor 2 years 5 months ago #1653

  • DariaBlackwell
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After all these years of refusing to use swivels and collecting photos of bent and broken swivels, we have now been convinced that the Ultra swivel is indeed a much improved and well engineered device. We had the opportunity to "play" with a demo set up at a boat show where Ultra was exhibiting. We spent a good deal of time inspecting it and watching it work in slow motion and talking to people who understand the engineering aspects.

The Ultra Flip Swivel has a unique design that works with any anchor to rotate it BEFORE it comes up over the bow roller if it is coming up in the worn orientation. It allows the ball to rotate freely, you can inspect all the parts (except one which I'll discuss in a moment), and all the parts can dry out. That's very important. www.ultramarine-anchors.com/en/homepage/default/10/swivel-detail

The only potential problem area that we can see is eventual wear in a Teflon o-ring that's between the ball and the body of the swivel. As stated in their promotional literature "Our internal TEFLON O-Ring stops metal friction occurring when under load providing low resistance and smooth operation." The o-ring is intended to prevent the metal to metal friction that would occur as the ball rotates. We could not see this o-ring so we could not inspect it. The Ultra swivel has a 3 year warranty. I'd say that may be the life of the o-ring. Just something to keep in mind. Otherwise we were very impressed with the design and engineering of the Ultra Swivel. It carries Turkish Lloyd certification.

We have not had the opportunity to test the WASI Power Ball but it does seem to offer excellent construction and a breaking load higher than that of the corresponding chain. It is approved by the German Lloyd which may have insurance implications. www.wasi.de/en/news/press-releases-and-news-from-wasi/news-details/haerteste-anforderungen-edelstahl-verbindungselemente-im-maritimen-einsatz.html

The best possible set-up if you feel you need a swivel and you have a standard bullet type swivel is to insert a few links of chain between the swivel and the anchor to ensure that lateral forces cannot be applied across the axis of rotation.

If you don't know you need a swivel, you probably don't need one. If you relate to the picture below, then a swivel may change your anchoring experience dramatically. While we were at the Ultra stand, many petite women stopped in front of a poster with this picture and said out loud, "We need that honey!"

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Daria Blackwell
Rear Commodore
PR Officer, Editor OCC Digital Comms &
Port Officer, West of Ireland
s/v Aleria
www.coastalboating.net

ROCNA anchor 2 years 5 months ago #1654

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peterpaternotte wrote: Hi Daria,this comment is relatively late but I just came across the Forum topic. Being an early Rocna adept (following decades with CQR's) I did some 'swivel research' and ended up with the Wasi-Ball, very much like the Ultraswivel. It served us well for many years. You do not mention it but is has been around for 5-6 years now. Price indeed stiff, like the Ultra. Maybe something for the next printing of HH?


Yes, thanks Peter, we are planning a new edition of Happy Hooking, and we will be updating many sections including swivels. Thanks for the info on the WASI Ball.

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Daria Blackwell
Rear Commodore
PR Officer, Editor OCC Digital Comms &
Port Officer, West of Ireland
s/v Aleria
www.coastalboating.net

ROCNA anchor 1 year 6 months ago #2515

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We have just had the opportunity to test the new Vulcan anchor from Rocna. It was designed without a roll bar to fit bow rollers of power vessels. It has a significantly larger surface area than the Rocna or even the Ultra. It performed exceedingly well as described in an article we wrote about our experience.

cruising.coastalboating.net/Seamanship/Anchoring/Vulcan/index.html

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Daria Blackwell
Rear Commodore
PR Officer, Editor OCC Digital Comms &
Port Officer, West of Ireland
s/v Aleria
www.coastalboating.net

ROCNA anchor 6 months 3 weeks ago #3241

  • Dick
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Hi All,
A word of warning:
There is accumulated evidence that Rocna anchors have trouble re-setting in a significant wind shift. The evidence is most dramatically displayed on the excellent videos cited elsewhere in this stream (specifically:
), but there is numerous anecdotal evidence as well. This whole package of concern is best brought together on the web site Attainable Adventures Cruising ( www.morganscloud.com/ ), an extremely valuable web site for those that wander widely on sailboats. It costs a modest amount, but is worth every penny.
My best, Dick Stevenson, s/v Alchemy

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Dick Stevenson, s/v Alchemy

ROCNA anchor 6 months 3 weeks ago #3246

  • mina
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Occasionally my Rocna comes up back to front. If it happens twice in succession I turn the chain in the gipsy through 180 degrees and end of problem for a while.

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ROCNA anchor 6 months 3 weeks ago #3248

  • Alex_Blackwell
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Mina
Instead of turning your chain in the gypsy(capstan), you might consider unshackling and turning the shackle. That way you do not bring a twist down below-decks that can bite you at some point in the future.
Though we are not proponents of swivels, we have been testing and using the Ultra flip swivel now for over a year. it forces the anchor to twist into the correct orientation as it passes over the bow roller.
I can give you a link to a discussion on swivels if interested.

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Capt. Alex Blackwell
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Coastalboating.net

Happy Hooking – the Art of Anchoring
A “must have” for all boaters

ROCNA anchor 6 months 3 weeks ago #3249

  • mina
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Re the warning about Rocnas losing grip and dragging on wind shifts, all I can say is that after years of suffering from having to re-lay 1:4 times and many dragging incidents with my CQR, I have deployed my Rocna 100s of times over 7 years in every type of floor and conditions including many wild anchorages in the Beagle Channel where you get 50+knot williwaws screaming in at 90 degrees from previous wind angle. I have to re-lay only about 1 in 50 times now and , touch wood - crossed fingers, my Rocna has NEVER dragged. Granted it is a tad overweight at 40 kg for a 48 ft boat, but my Rocna has been a life-changer for us.
Tim Barker
Mina2.com

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ROCNA anchor 6 months 3 weeks ago #3250

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Thanks for the advice. Much appreciated, but like you I am not a fan of swivels and I've been using the occasional but very quick 90 degree twist for many years, happily without being bitten yet!

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ROCNA anchor 6 months 3 weeks ago #3255

  • Dick
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Hi all,
There are some comments pertinent to Rocna's and new generation anchors as well in the Anchors and Anchoring section. See particularly Simon's report.
Dick

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Dick Stevenson, s/v Alchemy

ROCNA anchor 6 months 3 weeks ago #3257

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Hi Tim,
I am glad you have had such a good experience with your Rocna and I am not surprised you find a huge improvement over your CQR, as you clearly give homage to. BTW, I do not believe your anchor to be overweight, perhaps it is even underweight depending on your tonnage. My Spade anchor is 35kg for a 40 foot/16 ton boat which I think is about right for those who occasionally anchor in marginal conditions where gale level winds might visit un-announced.
My best, Dick Stevenson, s/v Alchemy

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ROCNA anchor 6 months 3 weeks ago #3258

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Hi John, Good to hear from you. I have never had an anchor that always came up facing the correct way to get it onto the roller easily. They all needed occasional tweaking. Were you correct in reporting that it “always” comes up backward? That would surprise me and be curious.
My best to you and to the SYH crew,
Dick Stevenson, s/v Alchemy

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ROCNA anchor 6 months 3 weeks ago #3259

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Hi all,
Please go to the swivel area of this list serve where for a fuller discussion, but for here, I will say that I know of no significant problem that a swivel solves and have been anchoring for 30+ years without one. The thought of introducing such a problematic element to a ground tackle system designed to keep you and your boat safe just to help with the occasional backward anchor seems quite misguided. I do know they have proved a weak link to a number of vessels and that I am not alone in believing that stainless steel, the material most are made of, has no place in a ground tackle system.
Dick Stevenson, s/v Alchemy

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Dick Stevenson, s/v Alchemy
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