How To Choose The Rights Size Rocna or Vulcan Anchor For Your Boat...

Determining the correct size for your boat requires a simple calculation using the table below. Unlike most manufacturers Rocna factors in the weight of the boat in its calculation as well as the length. The table below applies to a standard monohull, if you have a catamaran or monohull with a large wheelhoue or flybridge then it is recommended that you select an anchor one size larger than stated. If you are unsure or would prefer us to look up the correct anchor for you, please fill in the form at the bottom of this page with as much information as possible and we will make a recommendation based on this. Alternattively please contact us on 01202 922189 or info@marinefactors.co.uk

ROCNA OR VULCAN MODEL
	4	6	9	10	12	15	20	25	33	40	55	70	110
Vessel Length			Vulcan only	Rocna only	Vulcan only							Rocna only	Rocna only
4 m	≤ 2 t
5 m	≤ 1 t	≤ 5 t
6 m	≤ ½ t	≤ 3.5 t	≤ 7 t
7 m	≤ ½ t	≤ 2 t	≤ 6 t	≤ 7 t	≤ 9 t
8 m		≤ 1 t	≤ 5 t	≤ 6 t	≤ 8 t	≤ 12 t
9 m		≤ ½ t	≤ 4 t	≤ 5 t	≤ 7 t	≤ 10 t	≤ 16 t
10 m			≤ 3 t	≤ 4 t	≤ 6 t	≤ 8.5 t	≤ 14 t	≤ 22 t
11 m				≤ 3 t	≤ 5 t	≤ 7 t	≤ 12 t	≤ 20 t
12 m					≤ 4 t	≤ 6 t	≤ 10 t	≤ 18 t	≤ 30 t
14 m						≤ 4 t	≤ 6 t	≤ 13 t	≤ 23 t	≤ 40 t
16 m							≤ 3 t	≤ 9 t	≤ 18 t	≤ 32 t	≤ 60 t
18 m								≤ 5 t	≤ 14 t	≤ 25 t	≤ 50 t	≤ 85 t
20 m									≤ 10 t	≤ 18 t	≤ 40 t	≤ 75 t	≤ 165 t
22 m									≤ 6 t	≤ 12 t	≤ 33 t	≤ 65 t	≤ 150 t
24 m										≤ 7 t	≤ 25 t	≤ 55 t	≤ 135 t
26 m											≤ 18 t	≤ 45 t	≤ 120 t
28 m												≤ 35 t	≤ 105 t
30 m													Use EN*
35 m													Use EN*
Anchor weight	4 kg	6 kg	9 kg	10 kg	12 kg	15 kg	20 kg	25 kg	33 kg	40 kg	55 kg	70 kg	110 kg
Anchor weight	9 lb	13 lb	20 lb	22 lb	27 lb	33 lb	44 lb	55 lb	73 lb	88 lb	121 lb	154 lb	243 lb
Rocna fluke area	460 cm²	590 cm²	-	795 cm²	-	1030 cm²	1140 cm²	1415 cm²	1695 cm²	1945 cm²	2300 cm²	2690 cm²	3330 cm²
Vulcan fluke area	420 cm²	560 cm²	730 cm²	-	880 cm²	1020 cm²	1240 cm²	1440 cm²	1730 cm²	1970 cm²	2430 cm²	-	-
Rec. G40 chain	6 mm	6 mm	7 mm	7 mm	8 mm	8 mm	9 mm	10 mm	10 mm	11 mm	12 mm	14 mm	16 mm
Rec. G40 chain	1/4"	1/4"	1/4"	1/4"	5/16"	5/16"	5/16"	3/8"	3/8"	7/16"	7/16"	1/2"	5/8"

Rocna Selection Guide
Download the selection guide above as a PDF...
SIZE CHART.pdf
Adobe Acrobat document [292.6 KB]

We are happy to advise you of the best size anchor for your boat. Please fill in as much information as possible in the form below and we will advise the correct size of Rocna or Vulcan anchor for your vessel (and whether we feel one will fit better than the other). If you don't know length or weight please just give us the make/model and we may be able to look this information up in our database. Once this form is filled in we will endeavour to respond to it within 24 hours.

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Size Checker - Fill in this form and we will advise the correct size of anchor for your boat. For length and weight please include units of measurement in the text fields (eg. 37FT or 7000KGS)

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Standard Monohull

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Monohull with Large Flybridge/Wheelhouse

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