Ultra-high holding power   
Independant Testing (see test results below) have proven that a Rocna possesses stopping power vastly superior to equivalent weight plough or claw types in soft sand or mud, due to the large blade area coupled with the blade's concave shape, which offers the greatest resistance of any form.

Instant setting
A Rocna always attains the correct attitude for penetration, and with its combination of chisel tip, roll-bar, and skids, is rapidly buried on most seabeds – typically within one meter.

Large blade area and chisel blade tip  
On a boat weight matters, and in a Rocna anchor every gram of metal is put to use. A large concave surface blade area offers superior holding power, and the chisel-like blade tip easily penetrates weed, grass, and kelp.

Roll-stable   
A Rocna is not susceptible to sudden "trip out". Owing to its optimized geometry, it remains embedded, and does not roll out on load-reversal or if dragged under extreme load.

Ease of use    
A Rocna self-launches and locks home on most bow rollers. A tight curve radius between the shank and blade give a positive lock, preventing movement at sea. The slotted shackle attachment point allows single-shackle fixing, and special holes are positioned for a buoyed retrieval line and tandem anchor, if required.

Roll-bar   
A Rocna's roll-bar ensures that the anchor will turn itself to the correct attitude for setting, every time. The skid-rails then direct the blade into the seabed. This also eliminates the need for dedicated tip-weight (an inefficiency common in other designs).

Versatility   
There is a Rocna to suit your boat, whether she's a small runabout or a vessel displacing 50 tons. Larger sizes can be custom designed for your vessel (please enquire).

Rugged strength    
The heavy-duty construction of a Rocna is attained through clever design and the use of Australian Bisalloy BISPLATE 80 steel. A Rocna is rock solid with no moving parts, eliminating complex adjustment systems and potentially dangerous failure points.

Durable   
A hot dip galvanized finish covers the entire surface of every Rocna with protective zinc, including the interior of the hollow rollbar.

Sizing Chart To choose the correctly sized Rocna, match your vessel's length with the most appropriate displacement range, also bearing in mind conditions of intended use (if in doubt, give preference to the larger anchor model). Unlike other manufacturers, our sizing recommendations are intended to provide an anchor adequate for use in most all conditions. For more on our philosophy and rationale, please consult our knowledge base article about the Rocna sizing philosophy and rationale. The Rocna 150 (331 lb) and larger: we do not provide standard recommendations for boats larger than those for which the Rocna 110 would be the recommended size. Classification society rules and/or legal requirements are likely to dictate the anchor sizes mandated for these vessels. DOWNLOAD a PDF of available sizes and specifications.