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Length x Weight (1 Tonne = 2,200 Pounds)
The Rocna was designed in New Zealand by Peter Smith, a Kiwi boat-builder and cruiser.
Dissatisfied with the performance of currently available anchors, Mr. Smith spent several years developing an anchor which would address the shortcomings identified in other anchors he'd used.
Testing each prototype aboard his 50' 27-ton aluminum alloy sloop Kiwi Roa, the design was improved until he was satisfied that he had achieved the optimal combination of features. Rocna: New-Generation AnchorRecent independent tests by Sail Magazine, Practical Sailor and Cruising World show that Rocna New-Generation type anchors consistently outperform the more traditional plow and claw-type designs.
The Rocna’s unique design delivers outstanding performance, as displayed in the Sail Magazine anchor testing, where Rocna was the #1 performing anchor in the critical “Max Hold Before Release” test - the maximum holding power generated before the anchor started to drag.
The Rocna provided over 40% higher holding power than the second best anchor!
The Rocna implements several features which contribute to its unique combination of quality, performance, and cost-effectiveness.
Selecting the correctly sized anchor to match your boat is not quite as simple as it may first seem. There are many factors to consider, including displacement, overall length, windage profile, and the conditions in which you intend to use your Rocna. Most manufacturers provide a very simple guide using only LOA, or displacement, for their different anchor sizes. We have gone a step further.
The following chart will give you a good indication of which Rocna we would recommend for your vessel. Match your vessel’s length with the most appropriate displacement in metric tonnes (T) (2,200 lbs) - if in doubt, always tend toward the larger anchor model.
There is a tendency amongst anchor manufacturers to recommend sizes smaller than required. For example, a certain world-renowned name-brand advises the use of a 20 Kg anchor on a heavy cruising yacht of LOA up to 14.8m. This recommendation is clearly far too light.
Another brand states that “a working anchor should hold up to 30 knots of wind”. Again, we consider this recommendation would lead to an undersized anchor.
We have resisted this temptation, and the above recommendations are appropriate for heavy-duty use. In our view, a working anchor should hold its boat in all but the most extreme weather.
Proudly Serving Boaters for 25 years
The Binnacle Canadian Mailing Address: 1065 Purcells Cove Rd. Halifax, NS, B3N 1R2