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Boat Anchor Scope Calculator — Rode Length for Safe Anchoring

Enter water depth and tidal range to calculate the recommended scope (anchor rode length) for safe boating.

★★★★★4.8(1,247 ratings)
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Rode Length Needed
161 ft
Total Depth (incl. freeboard)
23 ft
Swing Circle Diameter
322 ft
🆓 100% Free🔒 Runs in your browser Instant results📱 Works on any device
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How to Use This Anchor Scope Calculator

  1. Enter water depthCurrent depth at anchorage.
  2. Enter freeboardHeight of bow above water.
  3. Set scope ratio5:1 to 10:1.
  4. View rode lengthTotal chain/rope needed.

Common Use Cases

  • Boating
  • Nautical
  • Navigation
  • Outdoor

Frequently Asked Questions

This tool is for informational purposes only. Read our disclaimer.

Need help with this tool? help@bodhins.com

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