Vulcan Anchor by Rocna 25 Kg. #:  33657
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Vulcan Anchor by Rocna 25 Kg.

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The Vulcan is Rocna's first major design development since the launch of the highly successful and acclaimed Rocna anchor itself. With a Limited Lifetime Warranty against both breakage and bending in addition to manufacturing defects.
More Details...   #33657
Brand:  Rocna Anchors
MFG Part#:   VLC25GS
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Vulcan VLC25GS Anchor by Rocna 25 Kg.

Open the Rocna & Vulcan Sizing Chart below to view the appropriate size of Vulcan Anchor for your boat.

The Vulcan anchor is Rocna's first major design development since the launch of the highly successful and acclaimed Rocna anchor itself. Following on the success of the Rocna, designer Peter Smith was often approached by customers seeking to experience the exceptional holding power and setting performance of a Rocna, but who had difficulties accommodating the roll-bar design on their bow.

After years of testing and development, Peter has come up with a design that meets the needs of these customers – the Rocna Vulcan.

The Vulcan is carefully designed to offer the greatest possible compatibility across a wider range of vessel bow configurations, particularly powerboats with a bow pulpit. 

It brings the security and reliability of the Rocna anchor, highly successful and popular with offshore cruisers and adventurers, to a wider range of boaters who Rocna believe desire improved anchoring performance.

The original Rocna has "set the bar" for the highest performance and consistency of behavior when put to the test by a worldwide array of users, and in numerous independent tests. This performance is the result of careful design and engineering by Peter, who has again put to work all of his knowledge and experience to develop a variation on the theme of the ultimate anchor. 

The Vulcan capitalizes on already finely tuned design elements, infusing many of its elder siblings' proven performance advantages for an extremely quick and reliable set across a range of seabeds combined with rock solid holding power.

Breaking from the Rocna design, the Vulcan features a unique combination of shank and fluke geometry - including an innovative Roll-PalmTM at the rear of the fluke which self-rights the anchor on the seabed without the use of a roll-bar.

This is assisted by the V-BulbTMwhich extends fluke ballast downward to gain maximum leverage and efficiency. This development permits a larger fluke surface area than competing designs which rely on simple dead weight, while the concave fluke is similar in design to the Rocna, directly equating to more holding power and security. 

The omission of a roll-bar along with a carefully designed shank profile ensures a snug fit on the bows of a widely expanded range of vessels. Platforms, bowsprits, prods, stays, and other protrusions are easily cleared with no hassle or inconvenience.

The Vulcan's shank shape encourages self-launching and self-stowing upon retrieval on the majority of bow rollers, with a liquid smooth action, ensuring ease of use for all operators.

In addition to the use of high tensile steel, shank strength is optimized by a unique I+V ProfileTM shank design, granting improved resistance to bending courtesy of a computer-optimized I-beam geometry. This visually elegant innovation also improves setting performance, with the lower V edge cutting into the seabed and minimizing resistance to deep and secure burial.

Like the Rocna, each Vulcan anchor comes with a Limited Lifetime Warranty against both breakage and bending in addition to manufacturing defects.

  Rocna Anchors User's Guide

  Rocna & Vulcan Sizing Chart

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 20Kg 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.

Boat Length (up to)
Vulcan Model
13' (4m) <2T                    
16' (5m) <1T <5T                  
20' (6m) <0.5 <4T                  
23' (7m)   <2T <7T                
26' (8m)   <1T <6T <10T              
30' (9m)     <5T <9T <16T            
33' (10m)     <4T <8T <14T <25T          
36' (11m)     <3T <7T <12T <20T <30T        
39' (12m)       <6T <10T <15T <25T        
46' (14m)         <7T <12T <20T <40T      
52' (16m)           <9T <15T <33T <60T    
59' (18m)             <12T <25T <50T <90T  
66' (20m)             <10T <18T <40T <80T  
72' (22m)               <12T <30T <70T <150T
79' (24m)                 <25T <60T <130T
85' (26m)                 <22T <50T <115T
92' (28m)                   <45T <100T
98' (30m)                   <40T <90T
115' (35m)                     <80T
131' (40m)                     <70T
148' (45m)                     <60T
Anchor Weight 4kg (9lbs) 6kg (13lbs) 10kg (22lbs) 15 kg (33lbs) 20kg (44lbs) 25kg (55lbs) 33kg (73lbs) 40kg (88lbs) 55kg (121lbs) 70kg (154lbs) 110kg (243lbs)
Blade Surface Area (cm sq) 460 590 795 1030 1140 1415 1695 1945 2300 2690 3300

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Q. Do you offer Free Shipping?
A. We have Free ground shipping via UPS to the Lower 48 States on most orders of $199 or more.

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A. Some items are exempt from this offer and are indicated on the product page. Exempt items are usually bulky or heavy items such as buoys. Over 98% of the items on qualify for the free shipping offer.

Q. Where do you ship from and What is the delivery time?
A. We ship from Halifax, Nova Scotia. Delivery time will be 3 - 7 business days. Northeast will be 3 - 4 days and Southwest and Pacific coast will be 7 business days. Most other areas are 5 business days.

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A. To see what your shipping charge (if any) will be you can add the item(s) and quantities to the shopping cart and you will see a shipping cost calculator.

Q. Will I be charged any sales taxes?
A. No. We are located in Canada and we are not required to charge US state sales taxes.

Q. Do I have to pay any customs charges or duties?
A. No. Orders under $800 do not receive any customs charges by US Customs. On Orders over $800 pays the charges - You will not be charged anything for duties or customs brokerage fees.

This item has a shipping surcharge of US$35.00
This amount will be added to the shipping charges listed above.
Money Back Guarantee
Guarantee You may return your purchase to us (with a return authorization number - use this form) within 30 days and we will refund the purchase price of the product. Items which are cut to order (rope, wire etc), software, chart cards and printed materials (paper charts, books) are not returnable.
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