OUPV & 100-Ton Master · Anchoring
A commonly recommended minimum scope for anchoring under ordinary conditions, using all-chain rode, is about:
- A1:1 (rode equal to depth)
- B3:1
- C5:1 to 7:1 (rode to depth plus height of bow above water)✓ Correct
- D20:1
Explanation
A scope of about 5:1 to 7:1 (rode length to the depth of water plus the height of the bow chock above the water) gives a good horizontal pull on the anchor so it digs in rather than breaking out. Heavier weather calls for more scope.
Authority: Seamanship; prudent practice
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