Rocna

What Is a Rocna and Why Does the Roll Bar Matter

Before the Rocna, most cruising boats anchored on a plow-shaped CQR or Delta, or a claw-shaped Bruce, designs that had to skid, tumble or drag across the bottom before their weighted nose found the ground and began to dig in. Peter Smith's insight, developed over decades of high-latitude cruising on his own steel boat Kiwi Roa, was to combine a deeply concave, spade-like fluke (for maximum grip once buried) with a roll bar that acts as a mechanical righting arm: whichever way the anchor lands, the bar's curve rolls it over so the fluke's chisel tip points down and the shank sits at the ideal setting angle, typically on the very first drop. A tip-weighted fluke, about a third of the anchor's total mass concentrated at the point per Rocna's own figures, adds further bias toward digging in nose-first rather than skating.

The result, when it works, is an anchor that sets fast and holds hard in the sand and firm mud most cruisers anchor in most of the time, which is why the Rocna and its many roll-bar imitators (Manson Supreme, Mantus and others) are now the default recommendation on most cruising forums in place of a CQR or Delta. The tradeoff, covered in detail further down this page, is that the same roll bar and concave fluke that make the anchor set so reliably in sand have a documented weak spot in very soft mud and a smaller but real history of fouling on weed and debris when an anchor drags and has to reset without being lifted clear first.

Who Owns Rocna Today and How the Brand Nearly Wrecked Itself

Peter Smith launched Rocna commercially in 2004 and, needing production capacity beyond his own workshop, licensed manufacturing to Hold Fast Anchors Ltd from January 2007. That licence became the brand's low point: in the first half of 2010 Hold Fast shipped roughly 700 anchors, spanning the 4 kg to 110 kg sizes, made from Q420 steel that tested as much as 39 percent below the advertised 690 MPa yield strength. West Marine, a major US retailer of the brand, issued a recall notice, and Smith published a detailed public account on his own site acknowledging the problem while noting the affected anchors were still stronger than mild-steel competitors and posed no acute danger in normal use. The licence was pulled and reassigned to Canada Metal Pacific Ltd, a Vancouver-area manufacturer, effective 20 September 2011, and Canada Metal introduced the lifetime bend-and-break warranty specifically to rebuild trust in the name.

Canada Metal Pacific has changed hands twice since: Branford Castle sold the company to Ironbridge Equity Partners in a deal that closed 12 October 2018, and Ironbridge took majority control again in 2023, with former owners John Mitchell, the Szwez family and senior management retaining a minority stake. Rocna now sits inside the CMP Group of Brands alongside Martyr anodes, Titan anchor chain and Octopus autopilots, manufactured at CMP's own ISO 9001 certified plant in Ningbo, China for both galvanized and stainless lines. Buyers researching the brand should treat any anchor claiming New Zealand manufacture as out of date by well over a decade; genuine current-production Rocna and Vulcan anchors are Chinese-made under a Canadian owner, a fact the company states openly on its own product markings and knowledge base rather than hiding.

Rocna is the anchor that proved the roll-bar, concave-fluke shape works, still tests near the top of the field in sand two decades on, but carries a real and independently documented weakness in soft mud and a counterfeit problem serious enough that Rocna itself publishes a warning about it.

What Sizes Rocna Makes and Which One Actually Fits Your Boat

The full production range covers 4, 6, 9, 10, 12, 15, 20, 25, 33, 40, 55, 70 and 110 kg as catalog sizes, with 150, 200 and 275 kg built to order for commercial and superyacht use; a 33 foot monohull typically lands on the 15 kg (33 lb) size, a 46 footer on 33 kg (73 lb), and a 66 foot yacht on 55 kg (121 lb) per Rocna's published chart. What separates Rocna's chart from most rivals is the stated design basis: Smith built the sizing tables around a boat riding out 50 knots of wind and surge on a soft-to-moderate bottom, not the calmer conditions some competitors size against, and the company's own literature criticizes an unnamed major rival for recommending an anchor it calls a 'light-weight temporary hook' for a 49 foot cruising yacht. Because of that built-in margin, Rocna's own advice to buyers is blunt: 'don't over-size, we already did that for you,' warning that going a size beyond the chart mainly adds handling problems at the bow roller and windlass without a matching gain in holding power.

The one case where Rocna does recommend sizing up is multihulls, where the company's knowledge base states an anchor should be up to 50 percent heavier than the monohull recommendation for the same length, which in practice usually means picking the next size up the chart rather than doing new math. Cruisers on forums such as Cruisers Forum and Trawler Forum broadly echo this rather than pushing further oversizing, a contrast with some other new-generation brands where one-size-up is common owner advice; the caveat owners raise instead is chain and windlass compatibility, since a bigger Rocna needs matching chain and a windlass gypsy rated for both, which is easy to overlook when upgrading only the anchor itself.

How Rocna Compares to Ultra Marine Anchors and Mantus Marine

Ultra Marine Anchors, built in Turkey, took the roll-bar concept toward the luxury end of the market: its anchors are machined and hand-polished from solid 316 stainless steel rather than galvanized mild steel, which is why a 35 kg Ultra runs around 3,850 US dollars against roughly 1,420 dollars for a galvanized 33 kg Rocna Original of similar holding class, a premium of well over double even before comparing like-for-like stainless Rocna pricing. Mantus Marine, a US brand, sits closer to Rocna on material and price (a galvanized 65 lb Mantus M1 runs about 945 dollars) but differs in fluke geometry, forum posters on YBW Forum and Cruisers Forum describing the Mantus fluke as both longer and wider than the equivalent Rocna, with a larger roll bar that owners say clogs with weed and mud less readily than Rocna's tighter-radius bar. Mantus also ships as a bolt-together anchor that separates for stowage, which some owners like for a small locker and others find fiddly to keep tight over years of use.

On paper the three anchors test closely in firm sand, where Practical Sailor and West Marine testing both found modern roll-bar and spade designs bunching within a few hundred pounds of each other at a given weight. The gap opens in soft mud: Practical Sailor's Chesapeake Bay series recorded the Rocna failing to set at all, the Mantus performing better despite lacking a weighted toe, and the Ultra out-holding the Mantus, Manson Supreme and Rocna's roll-bar peers by roughly 20 percent, while cautioning that none of the roll-bar designs produced fully reassuring numbers in the softest bottoms tested. For a buyer choosing between the three, the honest summary from independent testers and long-running owner threads alike is that Rocna is the widest-stocked and most affordably priced of the three in galvanized steel, Mantus offers a comparable price with a roll bar owners rate as less prone to foul, and Ultra costs the most by a wide margin but tests best in the one bottom type, soft mud, where all roll-bar anchors are weakest.

What a Rocna Costs New, and the Genuine Versus Counterfeit Price Gap

Rocna does not publish a single combined price list on its own site; every figure here comes from authorized dealer listings. Fisheries Supply's current US pricing for galvanized Rocna Originals runs 241.58 dollars at 4 kg (9 lb), 570.60 dollars at 15 kg (33 lb), 727.06 dollars at 20 kg (44 lb), 983.60 dollars at 25 kg (55 lb), 1,418.47 dollars at 33 kg (73 lb), climbing to 7,085.49 dollars at 110 kg (243 lb) on special order, with 150, 200 and 275 kg sizes priced higher still and quoted per order. Stainless steel versions cost roughly three to five times the equivalent galvanized size, a premium sources attribute to the cost and scarcity of high-tensile stainless bar stock plus the man-hours needed to hand-polish a mirror finish, putting a stainless equivalent of the 20 kg Original well north of 2,000 dollars before matching it against Ultra's fully polished 316 construction at a similar or higher price point.

The counterfeit problem is specific to Rocna's shape rather than its branding: because the roll-bar, concave-fluke profile is now widely copied, unbranded or vaguely labeled 'Rocna type' anchors circulate on eBay and Alibaba, reported by forum members on YBW Forum at roughly a third of genuine dealer pricing. Rocna's own knowledge base and long-running owner threads describe the giveaway as the shank steel: a genuine Rocna uses a rated high-tensile shank that Rocna's own destructive testing has shown bending only at more than 6.5 times the anchor's proof-load requirement, while copies commonly use an unrated mild-steel shank that bends at a fraction of that force, a failure mode owners call an order of magnitude worse for holding than a straight shank. The safest practical test for a buyer is provenance rather than appearance: buy from an authorized Rocna dealer with a traceable invoice, since a counterfeit built to visually match a genuine anchor can still carry the wrong steel inside a shank that looks identical from the outside.

What Independent Holding-Power Tests Actually Show

The test Rocna itself cites most is the 2006 West Marine and SAIL Magazine series, which pulled 14 anchor types across three real-world sand seabeds; the Rocna 15 (32 lb) came out on top of that field, holding a minimum of 4,500 lbf and engaging immediately on every drop, roughly 40 percent ahead of the second-place Spade and dramatically ahead of older designs like the Delta, whose 35 lb unit maxed out around 3,250 lbf. That result, now two decades old and run before Mantus or the current Ultra existed as competitors, is still the most frequently quoted number in Rocna's own marketing and on retailer pages, and it remains a fair characterization of Rocna's strength in the sand bottoms most recreational cruisers anchor in most of the time.

Two more recent and more skeptical sources complicate that picture. Practical Sailor's Chesapeake Bay soft-mud testing found the Rocna did not set at all in the softest bottom tested, attributing the failure to the anchor landing upside down in a substrate too weak for the roll bar's self-righting action to complete, while the Ultra, Mantus and Manson Supreme (also roll-bar designs) fared better without producing what the magazine called reassuring numbers. SV Panope, the YouTube channel widely cited on Cruisers Forum and Trawler Forum for its 180 degree reversal and veer protocol across varied Pacific Northwest seabeds, tested a 45 lb and a 22 lb Rocna and found both ranked near the bottom of the anchors it has tested for resetting after a load reversal, though critics on the same forums note Panope's tests do not measure peak holding force directly and its PNW test grounds are not representative of every bottom a cruiser will anchor in. Taken together, the honest reading is that Rocna's headline sand performance is real and well documented, its soft-mud and reset performance is a genuine and repeatedly documented weak point, and a buyer who anchors mostly in mud or expects frequent load reversals should weigh the Ultra or a broad-fluke design like a Fortress or Danforth alongside it rather than assume one anchor covers every bottom.

What Actually Goes Wrong: Resetting, Fouling and Galvanizing Complaints

Attainable Adventure Cruising, a subscription cruising-advice site run by experienced high-latitude sailors, published a widely discussed account of two Rocna-equipped boats that failed to reset after their anchors dragged, both accumulating enough weed and mud around the roll bar and fluke junction to prevent the anchor from digging in again without being hauled up, cleaned and redropped, a process that cost both boats hours of standing by under engine. Forum threads on Cruisers Forum's long-running 'Rocna roll bar' discussion and Trawler Forum echo the same failure mode in patchy weed or soft, debris-laden bottoms, though an equal number of long-term owners on the same threads report never experiencing it across years of cruising, suggesting local bottom conditions and how an anchor is retrieved and redropped after a drag matter as much as the design itself. At least one cruiser documented on that Attainable Adventure Cruising thread switched their 33 kg Rocna for a Sarca Excel, a roll-bar-free Australian design, specifically to avoid repeat fouling in the weedy, rocky anchorages they frequented.

Galvanizing complaints cluster around two points: anchors from the Hold Fast era occasionally showing tip wear that exposed bare steel faster than expected, and the general fact that Rocna's shank uses high-tensile steel that requires careful handling during re-galvanizing, since an aggressive acid pickling stage before dipping can attack the steel itself rather than just the old zinc coating. Rocna's own FAQ acknowledges this and recommends re-galvanizing only through a shop experienced with high-tensile anchor shanks rather than a generic hot-dip galvanizer. Separately, owners on YBW Forum's long 'bad press by video' thread about the Panope test results note that Rocna's response to criticism has generally been to point to its 2006 sand results and its updated Mk II shank and fluke geometry rather than to dispute the mud and reset findings directly, which several posters read as a tacit acknowledgment that the weakness is real rather than a testing artifact.

Is a Rocna the Right Anchor for Your Boat

For the majority use case, an owner-driven monohull or trawler anchoring seasonally in typical coastal sand and firm mud, Rocna remains a sound and honestly well-tested choice: it is the anchor the 2006 West Marine test still holds up as a benchmark, it carries a real lifetime warranty against bending and breakage from a manufacturer that has visibly cleaned up its supply chain since the 2010-2011 Hold Fast crisis, and its galvanized pricing undercuts Ultra by a wide margin while roughly matching Mantus. Buyers should follow Rocna's own sizing chart rather than second-guessing it upward, since the company has already built in the safety margin that owners of other brands add for themselves, and should size up only for a multihull as Rocna itself recommends.

The buyer who should look elsewhere, or at least budget for a second anchor type, is one who cruises soft-mud estuaries and rivers, weedy tropical anchorages, or areas prone to sudden reversing currents and squalls, since that is exactly where Practical Sailor's testing, Attainable Adventure Cruising's fouling reports and SV Panope's reset testing all found roll-bar anchors including the Rocna underperforming. That buyer is better served either by an Ultra, which tested meaningfully better in soft mud at a real cost premium, or by carrying a genuinely different secondary anchor, a broad-fluke Fortress or Danforth for mud, rather than a second roll-bar design that will likely share the same weakness. Whichever anchor a buyer chooses, the counterfeit risk argues for buying only through an authorized dealer with a traceable invoice, since a fake built to the same silhouette can carry a shank that bends under real load.

Für wen: An owner-driven cruising monohull or trawler that anchors mainly in sand and firm mud and wants a well-warrantied, widely stocked, competitively priced new-generation anchor, bought only through an authorized dealer to avoid the shank-steel risk of counterfeits.