How to Size your Anchor and Chain

Here is a quick and simple guide to help you calculate the right size of anchor and the correct size of anchor rope and chain for your vessel. 

 

Boat Length (m)

Main Anchor (kg)

Kedge Anchor (kg)

Main Anchor Chain (mm)

Main Anchor Rope (mm)

Kedge Anchor Chain (mm)

Kedge Anchor Rope (mm)

6

8

4

6

12

6

10

7

9

4

8

12

6

10

8

10

5

8

12

6

10

9

11

5

8

12

6

10

10

13

6

8

12

6

10

11

15

7

8

12

6

10

12

18

9

8

14

8

12

13

21

10

10

14

8

12

14

24

12

10

14

8

12

15

27

13

10

N/A *

8

12

16

30

15

10

N/A *

8

12

17

34

17

10

N/A *

8

14

18

38

19

10

N/A *

8

14

19

42

21

12

N/A *

10

14

20

47

23

12

N/A *

10

14

21

52

26

12

N/A *

10

14

22

57

28

12

N/A *

10

16

23

62

31

12

N/A *

10

16

24

68

34

12

N/A *

10

16

 

* Under MCA Guidance it is not advisable for a vessel over 15m in length to use rope as part of the main anchor rode (rope).  Chain is preferable for a vessel of this size.

 

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