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

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

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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