Deck General · Ground Tackle & Anchoring
When anchoring in moderate weather, the recommended scope (ratio of rode length to water depth) is generally:
- A2:1 to 3:1
- B5:1 to 7:1✓ Correct
- C10:1 to 12:1
- D1:1 — the rode is equal to the depth
Explanation
A scope of 5:1 to 7:1 is the standard recommendation for moderate conditions. Greater scope keeps the pull on the anchor more horizontal, maximizing holding power. In storm conditions, 10:1 may be needed. Scope must account for total depth from hawsepipe to bottom, not just chart depth.
Authority: Deck Seamanship (USCG deck topic)
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